Achilles Tang

Achilles Tang

Acanthurus achilles

Aggressive Saltwater 10" · 125gal+
Afra Cichlid

Afra Cichlid

Cynotilapia afra

Aggressive Freshwater 4" · 40gal+
African Butterfly Cichlid

African Butterfly Cichlid

Anomalochromis thomasi

Peaceful Freshwater 3" · 20gal+
African Dwarf Frog

African Dwarf Frog

Hymenochirus boettgeri

Peaceful Freshwater 2.5" · 10gal+
Agassiz's Dwarf Cichlid

Agassiz's Dwarf Cichlid

Apistogramma agassizii

Semi-aggressive Freshwater 3" · 20gal+
Aiptasia-Eating Filefish

Aiptasia-Eating Filefish

Acreichthys tomentosus

Peaceful Saltwater 4" · 30gal+
Allard's Clownfish

Allard's Clownfish

Amphiprion allardi

Semi-aggressive Saltwater 5.5" · 30gal+
Altifrons Eartheater

Altifrons Eartheater

Geophagus altifrons

Peaceful Freshwater 10" · 75gal+
Amano Shrimp

Amano Shrimp

Caridina multidentata

Peaceful Freshwater 2" · 10gal+
American Flagfish

American Flagfish

Jordanella floridae

Semi-aggressive Freshwater 2.5" · 10gal+
Angelfish

Angelfish

Pterophyllum scalare

Semi-aggressive Freshwater 6" · 30gal+
Arc Eye Hawkfish

Arc Eye Hawkfish

Paracirrhites arcatus

Semi-aggressive Saltwater 5" · 30gal+
Arulius Barb

Arulius Barb

Dawkinsia arulius

Peaceful Freshwater 5" · 30gal+
Asian Stone Catfish

Asian Stone Catfish

Hara jerdoni

Peaceful Freshwater 1.5" · 10gal+
Assassin Snail

Assassin Snail

Clea helena

Peaceful Freshwater 1" · 10gal+
Atlantic Blue Tang

Atlantic Blue Tang

Acanthurus coeruleus

Semi-aggressive Saltwater 15" · 100gal+
Auratus Cichlid

Auratus Cichlid

Melanochromis auratus

Aggressive Freshwater 4" · 55gal+
Auriga Butterflyfish

Auriga Butterflyfish

Chaetodon auriga

Peaceful Saltwater 9" · 75gal+
Aurora Goby

Aurora Goby

Amblyeleotris aurora

Peaceful Saltwater 4" · 20gal+
Australian Rainbowfish

Australian Rainbowfish

Melanotaenia splendida

Peaceful Freshwater 5" · 30gal+
Axolotl

Axolotl

Ambystoma mexicanum

Peaceful Freshwater 12" · 20gal+
Azure Damselfish

Azure Damselfish

Chrysiptera hemicyanea

Semi-aggressive Saltwater 2.5" · 20gal+
Balloon Molly

Balloon Molly

Poecilia latipinna

Peaceful Freshwater 3" · 20gal+
Bamboo Shrimp

Bamboo Shrimp

Atyopsis moluccensis

Peaceful Freshwater 3" · 20gal+
Banana Wrasse

Banana Wrasse

Thalassoma lutescens

Semi-aggressive Saltwater 10" · 75gal+
Banded Gourami

Banded Gourami

Trichogaster fasciata

Semi-aggressive Freshwater 4" · 20gal+
Banggai Cardinalfish

Banggai Cardinalfish

Pterapogon kauderni

Peaceful Saltwater 3" · 20gal+
Banjo Catfish

Banjo Catfish

Bunocephalus coracoideus

Peaceful Freshwater 5" · 20gal+
Bartlett's Anthias

Bartlett's Anthias

Pseudanthias bartlettorum

Peaceful Saltwater 3.5" · 55gal+
Beckford's Pencilfish

Beckford's Pencilfish

Nannostomus beckfordi

Peaceful Freshwater 1.5" · 10gal+
Bellus Angelfish

Bellus Angelfish

Genicanthus bellus

Peaceful Saltwater 7" · 75gal+
Betta

Betta

Betta splendens

Aggressive Freshwater 3" · 5gal+
Betta mahachaiensis

Betta mahachaiensis

Betta mahachaiensis

Semi-aggressive Freshwater 2" · 5gal+
Bicolor Angelfish

Bicolor Angelfish

Centropyge bicolor

Semi-aggressive Saltwater 6" · 30gal+
Bicolor Blenny

Bicolor Blenny

Ecsenius bicolor

Peaceful Saltwater 4" · 20gal+
Black Clown Goby

Black Clown Goby

Gobiodon strangulatus

Peaceful Saltwater 1.5" · 10gal+
Black Neon Tetra

Black Neon Tetra

Hyphessobrycon herbertaxelrodi

Peaceful Freshwater 1.5" · 10gal+
Black Phantom Tetra

Black Phantom Tetra

Hyphessobrycon megalopterus

Peaceful Freshwater 1.75" · 15gal+
Black Ruby Barb

Black Ruby Barb

Pethia nigrofasciata

Peaceful Freshwater 2.5" · 20gal+
Black Skirt Tetra

Black Skirt Tetra

Gymnocorymbus ternetzi

Semi-aggressive Freshwater 2.5" · 20gal+
Black Tang

Black Tang

Zebrasoma rostratum

Semi-aggressive Saltwater 8" · 100gal+
Black-Barred Limia

Black-Barred Limia

Limia nigrofasciata

Peaceful Freshwater 2.5" · 20gal+
Blackcap Basslet

Blackcap Basslet

Gramma melacara

Peaceful Saltwater 4" · 30gal+
Bleeding Heart Tetra

Bleeding Heart Tetra

Hyphessobrycon erythrostigma

Peaceful Freshwater 2.5" · 20gal+
Blonde Naso Tang

Blonde Naso Tang

Naso elegans

Semi-aggressive Saltwater 16" · 125gal+
Blood Parrot Cichlid

Blood Parrot Cichlid

Hybrid (Amphilophus x Vieja)

Semi-aggressive Freshwater 8" · 30gal+
Bloodfin Tetra

Bloodfin Tetra

Aphyocharax anisitsi

Peaceful Freshwater 2" · 20gal+
Blue Acara

Blue Acara

Andinoacara pulcher

Semi-aggressive Freshwater 6" · 30gal+
Blue Devil Damselfish

Blue Devil Damselfish

Chrysiptera cyanea

Aggressive Saltwater 3" · 20gal+
Blue Dolphin Cichlid

Blue Dolphin Cichlid

Cyrtocara moorii

Semi-aggressive Freshwater 10" · 75gal+
Blue Green Chromis

Blue Green Chromis

Chromis viridis

Peaceful Saltwater 3" · 30gal+
Blue Platy

Blue Platy

Xiphophorus maculatus

Peaceful Freshwater 2.5" · 10gal+
Blue Spotted Puffer

Blue Spotted Puffer

Canthigaster solandri

Semi-aggressive Saltwater 4.5" · 30gal+
Blue Star Leopard Wrasse

Blue Star Leopard Wrasse

Macropharyngodon bipartitus

Peaceful Saltwater 5" · 55gal+
Blue Tang

Blue Tang

Paracanthurus hepatus

Semi-aggressive Saltwater 12" · 75gal+
Blue Tetra

Blue Tetra

Boehlkea fredcochui

Semi-aggressive Freshwater 2.5" · 20gal+
Blue Throat Triggerfish

Blue Throat Triggerfish

Xanthichthys auromarginatus

Semi-aggressive Saltwater 9" · 75gal+
Blue Velvet Shrimp

Blue Velvet Shrimp

Neocaridina davidi var. blue

Peaceful Freshwater 1.5" · 5gal+
Blue-Eye Livebearer

Blue-Eye Livebearer

Priapella intermedia

Peaceful Freshwater 2.5" · 20gal+
Blue-Eyed Cardinalfish

Blue-Eyed Cardinalfish

Apogon leptacanthus

Peaceful Saltwater 2" · 10gal+
Boesemani Rainbowfish

Boesemani Rainbowfish

Melanotaenia boesemani

Peaceful Freshwater 4.5" · 30gal+
Bolivian Ram

Bolivian Ram

Mikrogeophagus altispinosus

Peaceful Freshwater 3" · 20gal+
Bristlenose Pleco

Bristlenose Pleco

Ancistrus spp.

Peaceful Freshwater 5" · 20gal+
Bronze Corydoras

Bronze Corydoras

Corydoras aeneus

Peaceful Freshwater 2.5" · 15gal+
Brown's Betta

Brown's Betta

Betta brownorum

Peaceful Freshwater 1.5" · 5gal+
Brunei Beauty

Brunei Beauty

Betta macrostoma

Semi-aggressive Freshwater 4.5" · 20gal+
Buenos Aires Tetra

Buenos Aires Tetra

Hyphessobrycon anisitsi

Semi-aggressive Freshwater 3" · 30gal+
Bumblebee Catfish

Bumblebee Catfish

Microglanis iheringi

Peaceful Freshwater 3" · 15gal+
Bumblebee Cichlid

Bumblebee Cichlid

Pseudotropheus crabro

Aggressive Freshwater 6" · 55gal+
Bumblebee Goby

Bumblebee Goby

Brachygobius xanthozonus

Peaceful Freshwater 1.5" · 10gal+
Calvus Cichlid

Calvus Cichlid

Altolamprologus calvus

Semi-aggressive Freshwater 5" · 30gal+
Canary Blenny

Canary Blenny

Meiacanthus oualanensis

Semi-aggressive Saltwater 4" · 20gal+
Cardinal Tetra

Cardinal Tetra

Paracheirodon axelrodi

Peaceful Freshwater 2" · 10gal+
Carpenter's Flasher Wrasse

Carpenter's Flasher Wrasse

Paracheilinus carpenteri

Peaceful Saltwater 3" · 40gal+
Carpenter's Flasher Wrasse

Carpenter's Flasher Wrasse

Paracheilinus carpenteri

Peaceful Saltwater 3" · 30gal+
Catalina Goby

Catalina Goby

Lythrypnus dalli

Peaceful Saltwater 2.5" · 10gal+
Celestial Pearl Danio

Celestial Pearl Danio

Danio margaritatus

Peaceful Freshwater 1" · 10gal+
Chalk Bass

Chalk Bass

Serranus tortugarum

Peaceful Saltwater 3" · 20gal+
Checkered Barb

Checkered Barb

Oliotius oligolepis

Peaceful Freshwater 2" · 15gal+
Cherry Barb

Cherry Barb

Puntius titteya

Peaceful Freshwater 2" · 10gal+
Cherry Shrimp

Cherry Shrimp

Neocaridina davidi

Peaceful Freshwater 1.5" · 5gal+
Chevron Tang

Chevron Tang

Ctenochaetus hawaiiensis

Semi-aggressive Saltwater 10" · 75gal+
Chili Rasbora

Chili Rasbora

Boraras brigittae

Peaceful Freshwater 0.7" · 5gal+
Chinese Algae Eater

Chinese Algae Eater

Gyrinocheilus aymonieri

Semi-aggressive Freshwater 10" · 30gal+
Chipokee Cichlid

Chipokee Cichlid

Melanochromis chipokae

Aggressive Freshwater 5" · 55gal+
Chisumulu Blue

Chisumulu Blue

Labidochromis chisumulae

Semi-aggressive Freshwater 3.5" · 30gal+
Chocolate Cichlid

Chocolate Cichlid

Hypselecara temporalis

Semi-aggressive Freshwater 10" · 55gal+
Chocolate Gourami

Chocolate Gourami

Sphaerichthys osphromenoides

Peaceful Freshwater 2.5" · 20gal+
Christmas Wrasse

Christmas Wrasse

Halichoeres claudia

Semi-aggressive Saltwater 5" · 50gal+
Cinnamon Clownfish

Cinnamon Clownfish

Amphiprion melanopus

Semi-aggressive Saltwater 5" · 30gal+
Citron Goby

Citron Goby

Gobiodon citrinus

Peaceful Saltwater 2" · 10gal+
Clarkii Clownfish

Clarkii Clownfish

Amphiprion clarkii

Semi-aggressive Saltwater 5" · 30gal+
Cleaner Wrasse

Cleaner Wrasse

Labroides dimidiatus

Peaceful Saltwater 4" · 55gal+
Clown Barb

Clown Barb

Barbodes dunckeri

Peaceful Freshwater 5" · 30gal+
Clown Killifish

Clown Killifish

Epiplatys annulatus

Peaceful Freshwater 1.4" · 5gal+
Clown Loach

Clown Loach

Chromobotia macracanthus

Peaceful Freshwater 12" · 75gal+
Clown Pleco

Clown Pleco

Panaqolus maccus

Peaceful Freshwater 3.5" · 20gal+
Clown Tang

Clown Tang

Acanthurus lineatus

Aggressive Saltwater 15" · 125gal+
Clown Triggerfish

Clown Triggerfish

Balistoides conspicillum

Aggressive Saltwater 20" · 120gal+
Cobalt Blue Zebra

Cobalt Blue Zebra

Maylandia callainos

Aggressive Freshwater 5" · 55gal+
Cockatoo Dwarf Cichlid

Cockatoo Dwarf Cichlid

Apistogramma cacatuoides

Semi-aggressive Freshwater 3" · 20gal+
Colombian Tetra

Colombian Tetra

Hyphessobrycon columbianus

Semi-aggressive Freshwater 2.5" · 20gal+
Common Goldfish

Common Goldfish

Carassius auratus

Peaceful Freshwater 12" · 30gal+
Common Pleco

Common Pleco

Hypostomus plecostomus

Peaceful Freshwater 18" · 75gal+
Compressiceps Cichlid

Compressiceps Cichlid

Altolamprologus compressiceps

Semi-aggressive Freshwater 6" · 30gal+
Congo Tetra

Congo Tetra

Phenacogrammus interruptus

Peaceful Freshwater 3.5" · 30gal+
Convict Cichlid

Convict Cichlid

Amatitlania nigrofasciata

Aggressive Freshwater 5" · 30gal+
Convict Tang

Convict Tang

Acanthurus triostegus

Semi-aggressive Saltwater 8" · 75gal+
Copperband Butterflyfish

Copperband Butterflyfish

Chelmon rostratus

Peaceful Saltwater 8" · 75gal+
Coral Banded Shrimp

Coral Banded Shrimp

Stenopus hispidus

Semi-aggressive Saltwater 3" · 20gal+
Coral Beauty Angelfish

Coral Beauty Angelfish

Centropyge bispinosa

Semi-aggressive Saltwater 4" · 30gal+
Coral Red Pencilfish

Coral Red Pencilfish

Nannostomus mortenthaleri

Peaceful Freshwater 1.2" · 10gal+
Court Jester Goby

Court Jester Goby

Koumansetta rainfordi

Peaceful Saltwater 3" · 20gal+
Croaking Gourami

Croaking Gourami

Trichopsis vittata

Peaceful Freshwater 2.5" · 10gal+
Crosshatch Triggerfish

Crosshatch Triggerfish

Xanthichthys mento

Semi-aggressive Saltwater 11" · 75gal+
Crystal Red Shrimp

Crystal Red Shrimp

Caridina cantonensis var. crystal red

Peaceful Freshwater 1.2" · 10gal+
Cuban Cichlid

Cuban Cichlid

Nandopsis tetracanthus

Aggressive Freshwater 10" · 75gal+
Cuckoo Catfish

Cuckoo Catfish

Synodontis multipunctatus

Semi-aggressive Freshwater 7" · 40gal+
Cupid Cichlid

Cupid Cichlid

Biotodoma cupido

Peaceful Freshwater 5" · 55gal+
Deep Water Hap

Deep Water Hap

Placidochromis electra

Semi-aggressive Freshwater 6" · 55gal+
Demasoni Cichlid

Demasoni Cichlid

Pseudotropheus demasoni

Aggressive Freshwater 3" · 55gal+
Denison Barb

Denison Barb

Sahyadria denisonii

Peaceful Freshwater 5" · 55gal+
Desjardin's Sailfin Tang

Desjardin's Sailfin Tang

Zebrasoma desjardinii

Semi-aggressive Saltwater 16" · 125gal+
Diadema Dottyback

Diadema Dottyback

Pseudochromis diadema

Semi-aggressive Saltwater 2.5" · 20gal+
Diamond Goby

Diamond Goby

Valenciennea puellaris

Peaceful Saltwater 6" · 30gal+
Diamond Tetra

Diamond Tetra

Moenkhausia pittieri

Peaceful Freshwater 2.5" · 20gal+
Discus

Discus

Symphysodon spp.

Peaceful Freshwater 8" · 55gal+
Dojo Loach

Dojo Loach

Misgurnus anguillicaudatus

Peaceful Freshwater 10" · 30gal+
Domino Damselfish

Domino Damselfish

Dascyllus trimaculatus

Aggressive Saltwater 5" · 30gal+
Dracula Goby

Dracula Goby

Stonogobiops dracula

Peaceful Saltwater 3" · 20gal+
Dragon Blood Peacock

Dragon Blood Peacock

Aulonocara spp. (hybrid)

Semi-aggressive Freshwater 6" · 55gal+
Dragon Wrasse

Dragon Wrasse

Novaculichthys taeniourus

Semi-aggressive Saltwater 12" · 75gal+
Duboisi Cichlid

Duboisi Cichlid

Tropheus duboisi

Aggressive Freshwater 5" · 75gal+
Dusky Wrasse

Dusky Wrasse

Halichoeres marginatus

Semi-aggressive Saltwater 7" · 55gal+
Dwarf Chain Loach

Dwarf Chain Loach

Ambastaia sidthimunki

Peaceful Freshwater 2" · 20gal+
Dwarf Gourami

Dwarf Gourami

Trichogaster lalius

Peaceful Freshwater 3.5" · 10gal+
Dwarf Pencilfish

Dwarf Pencilfish

Nannostomus marginatus

Peaceful Freshwater 1.2" · 10gal+
Dwarf Petricola Catfish

Dwarf Petricola Catfish

Synodontis lucipinnis

Peaceful Freshwater 3" · 20gal+
Dwarf Zebra Lionfish

Dwarf Zebra Lionfish

Dendrochirus zebra

Semi-aggressive Saltwater 7" · 30gal+
Electric Blue Acara

Electric Blue Acara

Andinoacara pulcher (hybrid)

Semi-aggressive Freshwater 6" · 30gal+
Electric Blue Ahli

Electric Blue Ahli

Sciaenochromis fryeri

Semi-aggressive Freshwater 7" · 55gal+
Electric Blue Jack Dempsey

Electric Blue Jack Dempsey

Rocio octofasciata (blue morph)

Semi-aggressive Freshwater 8" · 55gal+
Electric Blue Johanni

Electric Blue Johanni

Melanochromis johannii

Aggressive Freshwater 4" · 55gal+
Elephant Nose Fish

Elephant Nose Fish

Gnathonemus petersii

Semi-aggressive Freshwater 9" · 55gal+
Elongatus Cichlid

Elongatus Cichlid

Pseudotropheus elongatus

Aggressive Freshwater 5" · 55gal+
Ember Tetra

Ember Tetra

Hyphessobrycon amandae

Peaceful Freshwater 0.8" · 10gal+
Emerald Betta

Emerald Betta

Betta smaragdina

Semi-aggressive Freshwater 2.5" · 5gal+
Emerald Corydoras

Emerald Corydoras

Corydoras splendens

Peaceful Freshwater 3.5" · 20gal+
Emerald Crab

Emerald Crab

Mithraculus sculptus

Peaceful Saltwater 2" · 10gal+
Emperor Angelfish

Emperor Angelfish

Pomacanthus imperator

Semi-aggressive Saltwater 15" · 125gal+
Emperor Tetra

Emperor Tetra

Nematobrycon palmeri

Peaceful Freshwater 2" · 15gal+
Empire Gudgeon

Empire Gudgeon

Hypseleotris compressa

Peaceful Freshwater 4.5" · 20gal+
Endler's Livebearer

Endler's Livebearer

Poecilia wingei

Peaceful Freshwater 1.5" · 10gal+
Engineer Goby

Engineer Goby

Pholidichthys leucotaenia

Peaceful Saltwater 13" · 55gal+
Espei Rasbora

Espei Rasbora

Trigonostigma espei

Peaceful Freshwater 1.5" · 10gal+
Exclamation Point Rasbora

Exclamation Point Rasbora

Boraras urophthalmoides

Peaceful Freshwater 0.7" · 5gal+
Exquisite Fairy Wrasse

Exquisite Fairy Wrasse

Cirrhilabrus exquisitus

Peaceful Saltwater 5" · 50gal+
Fancy Goldfish

Fancy Goldfish

Carassius auratus (fancy varieties)

Peaceful Freshwater 8" · 20gal+
Featherfin Squeaker

Featherfin Squeaker

Synodontis eupterus

Peaceful Freshwater 8" · 30gal+
Festivum Cichlid

Festivum Cichlid

Mesonauta festivus

Peaceful Freshwater 6" · 40gal+
Figure Eight Puffer

Figure Eight Puffer

Dichotomyctere ocellatus

Semi-aggressive Freshwater 3" · 15gal+
Fiji Blue Devil Damselfish

Fiji Blue Devil Damselfish

Chrysiptera taupou

Semi-aggressive Saltwater 3" · 20gal+
Filament Barb

Filament Barb

Dawkinsia filamentosa

Peaceful Freshwater 5" · 30gal+
Filamented Flasher Wrasse

Filamented Flasher Wrasse

Paracheilinus filamentosus

Peaceful Saltwater 3" · 55gal+
Fire Eel

Fire Eel

Mastacembelus erythrotaenia

Semi-aggressive Freshwater 24" · 75gal+
Fire Shrimp

Fire Shrimp

Lysmata debelius

Peaceful Saltwater 2" · 20gal+
Firefish Goby

Firefish Goby

Nemateleotris magnifica

Peaceful Saltwater 3" · 20gal+
Firemouth Cichlid

Firemouth Cichlid

Thorichthys meeki

Semi-aggressive Freshwater 6" · 30gal+
Fisher's Angelfish

Fisher's Angelfish

Centropyge fisheri

Semi-aggressive Saltwater 3" · 30gal+
Five Bar Cichlid

Five Bar Cichlid

Neolamprologus tretocephalus

Aggressive Freshwater 6" · 40gal+
Flag Cichlid

Flag Cichlid

Laetacara curviceps

Peaceful Freshwater 3" · 20gal+
Flame Angelfish

Flame Angelfish

Centropyge loricula

Semi-aggressive Saltwater 4" · 30gal+
Flame Hawkfish

Flame Hawkfish

Neocirrhites armatus

Semi-aggressive Saltwater 3.5" · 30gal+
Flame Tetra

Flame Tetra

Hyphessobrycon flammeus

Peaceful Freshwater 1.5" · 10gal+
Flame Wrasse

Flame Wrasse

Cirrhilabrus jordani

Peaceful Saltwater 4" · 55gal+
Flavescent Peacock

Flavescent Peacock

Aulonocara stuartgranti 'Usisya'

Semi-aggressive Freshwater 6" · 55gal+
Flowerhorn

Flowerhorn

Hybrid (various Amphilophus × Vieja crosses)

Aggressive Freshwater 12" · 55gal+
Forktail Rainbowfish

Forktail Rainbowfish

Pseudomugil furcatus

Peaceful Freshwater 2" · 10gal+
Four Stripe Damselfish

Four Stripe Damselfish

Dascyllus melanurus

Aggressive Saltwater 3" · 20gal+
Foxface Rabbitfish

Foxface Rabbitfish

Siganus vulpinus

Peaceful Saltwater 9" · 75gal+
French Angelfish

French Angelfish

Pomacanthus paru

Semi-aggressive Saltwater 15" · 180gal+
Frontosa

Frontosa

Cyphotilapia frontosa

Semi-aggressive Freshwater 14" · 75gal+
Fuelleborni Cichlid

Fuelleborni Cichlid

Labeotropheus fuelleborni

Aggressive Freshwater 6" · 55gal+
Fuzzy Dwarf Lionfish

Fuzzy Dwarf Lionfish

Dendrochirus brachypterus

Semi-aggressive Saltwater 7" · 30gal+
Gardneri Killifish

Gardneri Killifish

Fundulopanchax gardneri

Semi-aggressive Freshwater 2.5" · 10gal+
Gem Tang

Gem Tang

Zebrasoma gemmatum

Semi-aggressive Saltwater 8" · 100gal+
Geophagus Tapajos Red Head

Geophagus Tapajos Red Head

Geophagus sp. 'Tapajos Red Head'

Peaceful Freshwater 7" · 55gal+
German Blue Ram

German Blue Ram

Mikrogeophagus ramirezi

Peaceful Freshwater 2.5" · 20gal+
Gertrude's Blue Eye

Gertrude's Blue Eye

Pseudomugil gertrudae

Peaceful Freshwater 1.5" · 10gal+
Giant Danio

Giant Danio

Devario aequipinnatus

Semi-aggressive Freshwater 4" · 30gal+
Giant Gourami

Giant Gourami

Osphronemus goramy

Semi-aggressive Freshwater 24" · 200gal+
Glass Catfish

Glass Catfish

Kryptopterus vitreolus

Peaceful Freshwater 3" · 20gal+
Glowlight Tetra

Glowlight Tetra

Hemigrammus erythrozonus

Peaceful Freshwater 1.5" · 10gal+
Gold Barb

Gold Barb

Barbodes semifasciolatus

Peaceful Freshwater 3" · 20gal+
Gold Head Compressiceps

Gold Head Compressiceps

Neolamprologus cylindricus

Semi-aggressive Freshwater 4" · 30gal+
Gold Nugget Pleco

Gold Nugget Pleco

Baryancistrus xanthellus

Semi-aggressive Freshwater 10" · 50gal+
Gold Ocellatus

Gold Ocellatus

Lamprologus ocellatus

Semi-aggressive Freshwater 2" · 10gal+
Gold Pristella Tetra

Gold Pristella Tetra

Pristella maxillaris (gold morph)

Peaceful Freshwater 1.8" · 15gal+
Gold Saum

Gold Saum

Andinoacara rivulatus (gold morph)

Aggressive Freshwater 10" · 55gal+
Gold Tetra

Gold Tetra

Hemigrammus rodwayi

Peaceful Freshwater 1.5" · 15gal+
Golden Pencilfish

Golden Pencilfish

Nannostomus anomalus

Peaceful Freshwater 1.2" · 10gal+
Golden Wonder Killifish

Golden Wonder Killifish

Aplocheilus lineatus

Semi-aggressive Freshwater 4" · 20gal+
Green Clown Goby

Green Clown Goby

Gobiodon histrio

Peaceful Saltwater 1.5" · 10gal+
Green Fire Tetra

Green Fire Tetra

Aphyocharax rathbuni

Peaceful Freshwater 1.5" · 15gal+
Green Neon Tetra

Green Neon Tetra

Paracheirodon simulans

Peaceful Freshwater 1" · 10gal+
Green Terror

Green Terror

Andinoacara rivulatus

Aggressive Freshwater 8" · 55gal+
Greenstripe Barb

Greenstripe Barb

Haludaria melanampyx

Peaceful Freshwater 3" · 20gal+
Guppy

Guppy

Poecilia reticulata

Peaceful Freshwater 2" · 10gal+
Half Black Angelfish

Half Black Angelfish

Centropyge vroliki

Semi-aggressive Saltwater 4" · 30gal+
Harlequin Rasbora

Harlequin Rasbora

Trigonostigma heteromorpha

Peaceful Freshwater 2" · 10gal+
Head and Tail Light Tetra

Head and Tail Light Tetra

Hemigrammus ocellifer

Peaceful Freshwater 2" · 15gal+
Hector's Goby

Hector's Goby

Koumansetta hectori

Peaceful Saltwater 2" · 10gal+
Helfrichi Firefish

Helfrichi Firefish

Nemateleotris helfrichi

Peaceful Saltwater 2.5" · 20gal+
Hendra's Betta

Hendra's Betta

Betta hendra

Peaceful Freshwater 1.5" · 5gal+
Hi Fin Red Banded Goby

Hi Fin Red Banded Goby

Stonogobiops nematodes

Peaceful Saltwater 2.5" · 20gal+
Hifin Swordtail

Hifin Swordtail

Xiphophorus hellerii

Peaceful Freshwater 5" · 20gal+
Hillstream Loach

Hillstream Loach

Sewellia lineolata

Peaceful Freshwater 3" · 20gal+
Honey Gourami

Honey Gourami

Trichogaster chuna

Peaceful Freshwater 2" · 10gal+
Hongsloi Dwarf Cichlid

Hongsloi Dwarf Cichlid

Apistogramma hongsloi

Semi-aggressive Freshwater 3" · 20gal+
Horsehead Loach

Horsehead Loach

Acantopsis dialuzona

Peaceful Freshwater 8" · 30gal+
Huma Huma Triggerfish

Huma Huma Triggerfish

Rhinecanthus aculeatus

Aggressive Saltwater 10" · 75gal+
Indian Glassfish

Indian Glassfish

Parambassis ranga

Peaceful Freshwater 3" · 15gal+
Jack Dempsey

Jack Dempsey

Rocio octofasciata

Aggressive Freshwater 10" · 55gal+
Jaguar Cichlid

Jaguar Cichlid

Parachromis managuensis

Aggressive Freshwater 16" · 75gal+
Japanese Swallowtail Angelfish

Japanese Swallowtail Angelfish

Genicanthus semifasciatus

Peaceful Saltwater 8" · 75gal+
Java Loach

Java Loach

Pangio oblonga

Peaceful Freshwater 3" · 15gal+
Jewel Cichlid

Jewel Cichlid

Hemichromis bimaculatus

Aggressive Freshwater 6" · 30gal+
Jewel Damselfish

Jewel Damselfish

Microspathodon chrysurus

Aggressive Saltwater 6" · 55gal+
Julii Corydoras

Julii Corydoras

Corydoras julii

Peaceful Freshwater 2" · 15gal+
Kenyi Cichlid

Kenyi Cichlid

Maylandia lombardoi

Aggressive Freshwater 5" · 55gal+
Keyhole Angelfish

Keyhole Angelfish

Centropyge tibicen

Semi-aggressive Saltwater 7" · 30gal+
Keyhole Cichlid

Keyhole Cichlid

Cleithracara maronii

Peaceful Freshwater 4" · 20gal+
Kissing Gourami

Kissing Gourami

Helostoma temminckii

Semi-aggressive Freshwater 12" · 55gal+
Kole Tang

Kole Tang

Ctenochaetus strigosus

Semi-aggressive Saltwater 7" · 75gal+
Krabi Mouth-Brooding Betta

Krabi Mouth-Brooding Betta

Betta simplex

Peaceful Freshwater 2.5" · 10gal+
Kribensis

Kribensis

Pelvicachromis pulcher

Semi-aggressive Freshwater 4" · 20gal+
Kubotai Rasbora

Kubotai Rasbora

Microdevario kubotai

Peaceful Freshwater 0.8" · 10gal+
Kuhli Loach

Kuhli Loach

Pangio kuhlii

Peaceful Freshwater 4" · 15gal+
Lamarck Angelfish

Lamarck Angelfish

Genicanthus lamarck

Peaceful Saltwater 9" · 75gal+
Lawnmower Blenny

Lawnmower Blenny

Salarias fasciatus

Peaceful Saltwater 5" · 30gal+
Least Killifish

Least Killifish

Heterandria formosa

Peaceful Freshwater 1" · 5gal+
Lemon Cichlid

Lemon Cichlid

Neolamprologus leleupi

Semi-aggressive Freshwater 4" · 20gal+
Lemon Tetra

Lemon Tetra

Hyphessobrycon pulchripinnis

Peaceful Freshwater 1.5" · 15gal+
Lemonpeel Angelfish

Lemonpeel Angelfish

Centropyge flavissima

Semi-aggressive Saltwater 5" · 30gal+
Leopard Wrasse

Leopard Wrasse

Macropharyngodon meleagris

Peaceful Saltwater 5" · 50gal+
Licorice Gourami

Licorice Gourami

Parosphromenus deissneri

Peaceful Freshwater 1.5" · 5gal+
Linke's Licorice Gourami

Linke's Licorice Gourami

Parosphromenus linkei

Peaceful Freshwater 1.5" · 5gal+
Lipstick Barb

Lipstick Barb

Pethia erythromycter

Peaceful Freshwater 1.5" · 15gal+
Livingstoni Cichlid

Livingstoni Cichlid

Nimbochromis livingstonii

Aggressive Freshwater 10" · 75gal+
Long-Finned Serpae Tetra

Long-Finned Serpae Tetra

Hyphessobrycon eques (long-fin variety)

Semi-aggressive Freshwater 1.8" · 20gal+
Longnose Butterflyfish

Longnose Butterflyfish

Forcipiger flavissimus

Peaceful Saltwater 9" · 75gal+
Longnose Hawkfish

Longnose Hawkfish

Oxycirrhites typus

Semi-aggressive Saltwater 5" · 30gal+
Loreto Tetra

Loreto Tetra

Hyphessobrycon loretoensis

Peaceful Freshwater 1.2" · 15gal+
Lubbock's Fairy Wrasse

Lubbock's Fairy Wrasse

Cirrhilabrus lubbocki

Peaceful Saltwater 3" · 30gal+
Lyretail Anthias

Lyretail Anthias

Pseudanthias squamipinnis

Peaceful Saltwater 5" · 75gal+
Lyretail Molly

Lyretail Molly

Poecilia latipinna

Peaceful Freshwater 5" · 20gal+
Macmaster's Dwarf Cichlid

Macmaster's Dwarf Cichlid

Apistogramma macmasteri

Semi-aggressive Freshwater 3" · 20gal+
Maingano Cichlid

Maingano Cichlid

Melanochromis cyaneorhabdos

Aggressive Freshwater 3" · 55gal+
Majestic Angelfish

Majestic Angelfish

Pomacanthus navarchus

Semi-aggressive Saltwater 12" · 125gal+
Malaysian Trumpet Snail

Malaysian Trumpet Snail

Melanoides tuberculata

Peaceful Freshwater 1" · 5gal+
Mandarin Dragonet

Mandarin Dragonet

Synchiropus splendidus

Peaceful Saltwater 3" · 30gal+
Marbled Hatchetfish

Marbled Hatchetfish

Carnegiella strigata

Peaceful Freshwater 1.5" · 15gal+
Marlier's Julie

Marlier's Julie

Julidochromis marlieri

Semi-aggressive Freshwater 5" · 20gal+
Maroon Clownfish

Maroon Clownfish

Premnas biaculeatus

Aggressive Saltwater 6" · 30gal+
Mascara Barb

Mascara Barb

Dawkinsia assimilis

Peaceful Freshwater 5" · 30gal+
Masked Julie

Masked Julie

Julidochromis transcriptus

Semi-aggressive Freshwater 3" · 15gal+
McCosker's Flasher Wrasse

McCosker's Flasher Wrasse

Paracheilinus mccoskeri

Peaceful Saltwater 3" · 30gal+
Melanurus Wrasse

Melanurus Wrasse

Halichoeres melanurus

Peaceful Saltwater 5" · 40gal+
Melon Barb

Melon Barb

Haludaria fasciata

Peaceful Freshwater 3" · 20gal+
Midas Blenny

Midas Blenny

Ecsenius midas

Peaceful Saltwater 5" · 30gal+
Midas Cichlid

Midas Cichlid

Amphilophus citrinellus

Aggressive Freshwater 12" · 55gal+
Mimic Tang

Mimic Tang

Acanthurus pyroferus

Semi-aggressive Saltwater 10" · 75gal+
Molly

Molly

Poecilia sphenops

Peaceful Freshwater 4" · 20gal+
Moonlight Gourami

Moonlight Gourami

Trichopodus microlepis

Peaceful Freshwater 6" · 30gal+
Mosquitofish

Mosquitofish

Gambusia affinis

Semi-aggressive Freshwater 2.5" · 10gal+
Multi Shell Dweller

Multi Shell Dweller

Neolamprologus multifasciatus

Semi-aggressive Freshwater 1.5" · 10gal+
Multicolor Angelfish

Multicolor Angelfish

Centropyge multicolor

Semi-aggressive Saltwater 3.5" · 30gal+
Murray River Rainbowfish

Murray River Rainbowfish

Melanotaenia fluviatilis

Peaceful Freshwater 4" · 30gal+
Mystery Snail

Mystery Snail

Pomacea bridgesii

Peaceful Freshwater 2" · 5gal+
Mystery Wrasse

Mystery Wrasse

Pseudocheilinus ocellatus

Semi-aggressive Saltwater 4" · 30gal+
Naso Tang

Naso Tang

Naso lituratus

Semi-aggressive Saltwater 18" · 125gal+
Neon Damselfish

Neon Damselfish

Pomacentrus coelestis

Semi-aggressive Saltwater 2.5" · 20gal+
Neon Dottyback

Neon Dottyback

Pseudochromis aldabraensis

Semi-aggressive Saltwater 3.5" · 20gal+
Neon Dwarf Rainbowfish

Neon Dwarf Rainbowfish

Melanotaenia praecox

Peaceful Freshwater 3" · 20gal+
Neon Goby

Neon Goby

Elacatinus oceanops

Peaceful Saltwater 2" · 10gal+
Neon Tetra

Neon Tetra

Paracheirodon innesi

Peaceful Freshwater 1.5" · 10gal+
Nerite Snail

Nerite Snail

Neritina spp.

Peaceful Freshwater 1" · 5gal+
Nicaraguan Cichlid

Nicaraguan Cichlid

Hypsophrys nicaraguensis

Semi-aggressive Freshwater 10" · 55gal+
Niger Triggerfish

Niger Triggerfish

Odonus niger

Semi-aggressive Saltwater 12" · 75gal+
Norman's Lampeye Killifish

Norman's Lampeye Killifish

Poropanchax normani

Peaceful Freshwater 1.5" · 10gal+
Nyassae Peacock

Nyassae Peacock

Aulonocara nyassae

Semi-aggressive Freshwater 6" · 55gal+
OB Mbuna

OB Mbuna

Maylandia spp. (OB morph)

Aggressive Freshwater 5" · 55gal+
OB Peacock Cichlid

OB Peacock Cichlid

Aulonocara spp.

Semi-aggressive Freshwater 6" · 55gal+
Ocellaris Clownfish

Ocellaris Clownfish

Amphiprion ocellaris

Semi-aggressive Saltwater 3" · 20gal+
Odessa Barb

Odessa Barb

Pethia padamya

Peaceful Freshwater 2.5" · 20gal+
One Spot Foxface

One Spot Foxface

Siganus unimaculatus

Peaceful Saltwater 8" · 75gal+
Orange Sakura Shrimp

Orange Sakura Shrimp

Neocaridina davidi var. orange

Peaceful Freshwater 1.5" · 5gal+
Orange Shoulder Tang

Orange Shoulder Tang

Acanthurus olivaceus

Semi-aggressive Saltwater 14" · 100gal+
Orange Skunk Clownfish

Orange Skunk Clownfish

Amphiprion sandaracinos

Peaceful Saltwater 4.5" · 20gal+
Orchid Dottyback

Orchid Dottyback

Pseudochromis fridmani

Semi-aggressive Saltwater 3" · 20gal+
Ornate Bichir

Ornate Bichir

Polypterus ornatipinnis

Semi-aggressive Freshwater 18" · 75gal+
Ornate Tetra

Ornate Tetra

Hyphessobrycon bentosi

Peaceful Freshwater 2" · 15gal+
Ornate Wrasse

Ornate Wrasse

Halichoeres ornatissimus

Semi-aggressive Saltwater 6" · 30gal+
Oscar

Oscar

Astronotus ocellatus

Aggressive Freshwater 14" · 75gal+
Otocinclus

Otocinclus

Otocinclus vittatus

Peaceful Freshwater 1.5" · 10gal+
Pacific Sailfin Tang

Pacific Sailfin Tang

Zebrasoma veliferum

Semi-aggressive Saltwater 15" · 125gal+
Pajama Cardinalfish

Pajama Cardinalfish

Sphaeramia nematoptera

Peaceful Saltwater 3" · 20gal+
Panda Barb

Panda Barb

Haludaria fasciata

Peaceful Freshwater 1.5" · 15gal+
Panda Corydoras

Panda Corydoras

Corydoras panda

Peaceful Freshwater 2" · 10gal+
Paradise Fish

Paradise Fish

Macropodus opercularis

Aggressive Freshwater 4" · 20gal+
Pea Puffer

Pea Puffer

Carinotetraodon travancoricus

Aggressive Freshwater 1" · 5gal+
Peaceful Betta

Peaceful Betta

Betta imbellis

Peaceful Freshwater 2" · 5gal+
Peacock Bass

Peacock Bass

Cichla ocellaris

Aggressive Freshwater 24" · 125gal+
Peacock Eel

Peacock Eel

Macrognathus siamensis

Peaceful Freshwater 9" · 30gal+
Peacock Gudgeon

Peacock Gudgeon

Tateurndina ocellicauda

Peaceful Freshwater 3" · 15gal+
Pearl Danio

Pearl Danio

Danio albolineatus

Peaceful Freshwater 2.5" · 15gal+
Pearl Gourami

Pearl Gourami

Trichopodus leerii

Peaceful Freshwater 4.5" · 30gal+
Penang Betta

Penang Betta

Betta pugnax

Peaceful Freshwater 3" · 15gal+
Penguin Tetra

Penguin Tetra

Thayeria boehlkei

Peaceful Freshwater 2.5" · 15gal+
Pentazona Barb

Pentazona Barb

Desmopuntius pentazona

Peaceful Freshwater 2" · 15gal+
Peppered Corydoras

Peppered Corydoras

Corydoras paleatus

Peaceful Freshwater 2.5" · 15gal+
Peppermint Shrimp

Peppermint Shrimp

Lysmata wurdemanni

Peaceful Saltwater 2" · 10gal+
Persephone Betta

Persephone Betta

Betta persephone

Peaceful Freshwater 1.2" · 5gal+
Phoenix Rasbora

Phoenix Rasbora

Boraras merah

Peaceful Freshwater 0.8" · 5gal+
Picta Livebearer

Picta Livebearer

Micropoecilia picta

Peaceful Freshwater 1.5" · 10gal+
Pictus Catfish

Pictus Catfish

Pimelodus pictus

Peaceful Freshwater 5" · 55gal+
Pike Cichlid

Pike Cichlid

Crenicichla lepidota

Aggressive Freshwater 10" · 55gal+
Pink Skunk Clownfish

Pink Skunk Clownfish

Amphiprion perideraion

Peaceful Saltwater 3.5" · 20gal+
Pinkbar Goby

Pinkbar Goby

Amblyeleotris periophthalma

Peaceful Saltwater 4" · 20gal+
Pintail Fairy Wrasse

Pintail Fairy Wrasse

Cirrhilabrus cf. lanceolatus

Peaceful Saltwater 4" · 50gal+
Platy

Platy

Xiphophorus maculatus

Peaceful Freshwater 2.5" · 10gal+
Polka Dot Loach

Polka Dot Loach

Botia kubotai

Peaceful Freshwater 5" · 30gal+
Polystigma Cichlid

Polystigma Cichlid

Nimbochromis polystigma

Aggressive Freshwater 9" · 75gal+
Pool Barb

Pool Barb

Puntius sophore

Peaceful Freshwater 4" · 20gal+
Porcupine Puffer

Porcupine Puffer

Diodon holocanthus

Semi-aggressive Saltwater 12" · 75gal+
Port Cichlid

Port Cichlid

Cichlasoma portalegrense

Semi-aggressive Freshwater 6" · 30gal+
Possum Wrasse

Possum Wrasse

Wetmorella nigropinnata

Peaceful Saltwater 2.5" · 10gal+
Potter's Angelfish

Potter's Angelfish

Centropyge potteri

Semi-aggressive Saltwater 4" · 30gal+
Powder Blue Tang

Powder Blue Tang

Acanthurus leucosternon

Aggressive Saltwater 9" · 100gal+
Powder Brown Tang

Powder Brown Tang

Acanthurus japonicus

Semi-aggressive Saltwater 8" · 75gal+
Princess of Burundi

Princess of Burundi

Neolamprologus brichardi

Semi-aggressive Freshwater 4" · 30gal+
Purple Firefish

Purple Firefish

Nemateleotris decora

Peaceful Saltwater 3.5" · 20gal+
Purple Tang

Purple Tang

Zebrasoma xanthurum

Aggressive Saltwater 10" · 100gal+
Pygmy Cherub Angelfish

Pygmy Cherub Angelfish

Centropyge argi

Semi-aggressive Saltwater 3" · 20gal+
Pygmy Corydoras

Pygmy Corydoras

Corydoras pygmaeus

Peaceful Freshwater 1" · 10gal+
Raccoon Butterflyfish

Raccoon Butterflyfish

Chaetodon lunula

Peaceful Saltwater 8" · 75gal+
Rachov's Nothobranchius

Rachov's Nothobranchius

Nothobranchius rachovii

Semi-aggressive Freshwater 2" · 5gal+
Radiant Wrasse

Radiant Wrasse

Halichoeres iridis

Peaceful Saltwater 5" · 55gal+
Rainbow Cichlid

Rainbow Cichlid

Herotilapia multispinosa

Semi-aggressive Freshwater 5" · 30gal+
Ramshorn Snail

Ramshorn Snail

Planorbella duryi

Peaceful Freshwater 1" · 5gal+
Randall's Shrimp Goby

Randall's Shrimp Goby

Amblyeleotris randalli

Peaceful Saltwater 4" · 20gal+
Red Devil

Red Devil

Amphilophus labiatus

Aggressive Freshwater 12" · 55gal+
Red Dwarf Betta

Red Dwarf Betta

Betta rutilans

Peaceful Freshwater 1.2" · 5gal+
Red Empress

Red Empress

Protomelas taeniolatus

Semi-aggressive Freshwater 6" · 55gal+
Red Eye Tetra

Red Eye Tetra

Moenkhausia sanctaefilomenae

Peaceful Freshwater 2.5" · 20gal+
Red Kadango

Red Kadango

Copadichromis borleyi

Semi-aggressive Freshwater 7" · 55gal+
Red Phantom Tetra

Red Phantom Tetra

Hyphessobrycon sweglesi

Peaceful Freshwater 1.5" · 15gal+
Red Rainbowfish

Red Rainbowfish

Glossolepis incisus

Peaceful Freshwater 6" · 55gal+
Red Terror

Red Terror

Mesoheros festae

Aggressive Freshwater 16" · 75gal+
Red Velvet Wrasse

Red Velvet Wrasse

Cirrhilabrus rubrisquamis

Peaceful Saltwater 3" · 50gal+
Red Wag Platy

Red Wag Platy

Xiphophorus maculatus

Peaceful Freshwater 2.5" · 10gal+
Red Zebra

Red Zebra

Maylandia estherae

Aggressive Freshwater 5" · 55gal+
Red-Bellied Pacu

Red-Bellied Pacu

Piaractus brachypomus

Peaceful Freshwater 30" · 250gal+
Red-Tail Catfish

Red-Tail Catfish

Phractocephalus hemioliopterus

Semi-aggressive Freshwater 48" · 300gal+
Redhead Cichlid

Redhead Cichlid

Vieja melanurus

Aggressive Freshwater 14" · 75gal+
Regal Angelfish

Regal Angelfish

Pygoplites diacanthus

Semi-aggressive Saltwater 10" · 100gal+
Regani Cichlid

Regani Cichlid

Julidochromis regani

Semi-aggressive Freshwater 5" · 20gal+
Roberts Tetra

Roberts Tetra

Hyphessobrycon robertsi

Peaceful Freshwater 1.5" · 15gal+
Rolland's Damselfish

Rolland's Damselfish

Chrysiptera rollandi

Semi-aggressive Saltwater 2.5" · 15gal+
Rope Fish

Rope Fish

Erpetoichthys calabaricus

Peaceful Freshwater 15" · 55gal+
Rosy Barb

Rosy Barb

Pethia conchonius

Peaceful Freshwater 4" · 20gal+
Rosy Loach

Rosy Loach

Petruichthys sp. 'rosy'

Peaceful Freshwater 1.2" · 10gal+
Rosy Tetra

Rosy Tetra

Hyphessobrycon rosaceus

Peaceful Freshwater 1.8" · 15gal+
Round-Tailed Paradise Fish

Round-Tailed Paradise Fish

Macropodus ocellatus

Semi-aggressive Freshwater 3" · 20gal+
Royal Gramma

Royal Gramma

Gramma loreto

Peaceful Saltwater 3" · 20gal+
Royal Pleco

Royal Pleco

Panaque nigrolineatus

Peaceful Freshwater 17" · 75gal+
Rubber Lip Pleco

Rubber Lip Pleco

Chaetostoma formosae

Peaceful Freshwater 4.5" · 20gal+
Ruby Head Fairy Wrasse

Ruby Head Fairy Wrasse

Cirrhilabrus cyanopleura

Peaceful Saltwater 5" · 55gal+
Ruby Tetra

Ruby Tetra

Axelrodia riesei

Peaceful Freshwater 0.7" · 5gal+
Rummy Nose Tetra

Rummy Nose Tetra

Hemigrammus rhodostomus

Peaceful Freshwater 2" · 20gal+
Rusty Cichlid

Rusty Cichlid

Iodotropheus sprengerae

Semi-aggressive Freshwater 4" · 30gal+
Saddleback Clownfish

Saddleback Clownfish

Amphiprion polymnus

Semi-aggressive Saltwater 5" · 30gal+
Sailfin Molly

Sailfin Molly

Poecilia velifera

Peaceful Freshwater 6" · 30gal+
Sailfin Pleco

Sailfin Pleco

Pterygoplichthys gibbiceps

Peaceful Freshwater 18" · 75gal+
Sajica Cichlid

Sajica Cichlid

Amatitlania sajica

Semi-aggressive Freshwater 5" · 30gal+
Salt and Pepper Corydoras

Salt and Pepper Corydoras

Corydoras habrosus

Peaceful Freshwater 1.2" · 10gal+
Salvini Cichlid

Salvini Cichlid

Trichromis salvini

Aggressive Freshwater 8" · 55gal+
Samurai Gourami

Samurai Gourami

Sphaerichthys vaillanti

Peaceful Freshwater 2" · 15gal+
Saulosi Cichlid

Saulosi Cichlid

Pseudotropheus saulosi

Semi-aggressive Freshwater 3.5" · 40gal+
Scarlet Badis

Scarlet Badis

Dario dario

Peaceful Freshwater 0.8" · 5gal+
Scarlet Skunk Cleaner Shrimp

Scarlet Skunk Cleaner Shrimp

Lysmata amboinensis

Peaceful Saltwater 3" · 20gal+
Scissortail Rasbora

Scissortail Rasbora

Rasbora trilineata

Peaceful Freshwater 3.5" · 20gal+
Scooter Blenny

Scooter Blenny

Synchiropus ocellatus

Peaceful Saltwater 3" · 30gal+
Scopas Tang

Scopas Tang

Zebrasoma scopas

Semi-aggressive Saltwater 8" · 75gal+
Scott's Fairy Wrasse

Scott's Fairy Wrasse

Cirrhilabrus scottorum

Peaceful Saltwater 5" · 55gal+
Sebae Clownfish

Sebae Clownfish

Amphiprion sebae

Semi-aggressive Saltwater 5.5" · 30gal+
Senegal Bichir

Senegal Bichir

Polypterus senegalus

Semi-aggressive Freshwater 12" · 55gal+
Serpae Tetra

Serpae Tetra

Hyphessobrycon eques

Semi-aggressive Freshwater 1.75" · 20gal+
Severum

Severum

Heros severus

Semi-aggressive Freshwater 8" · 55gal+
Siamese Algae Eater

Siamese Algae Eater

Crossocheilus oblongus

Peaceful Freshwater 6" · 30gal+
Siamese Stone Lapping Fish

Siamese Stone Lapping Fish

Gastromyzon punctulatus

Peaceful Freshwater 2" · 15gal+
Silver Arowana

Silver Arowana

Osteoglossum bicirrhosum

Semi-aggressive Freshwater 36" · 250gal+
Silver Hatchetfish

Silver Hatchetfish

Gasteropelecus sternicla

Peaceful Freshwater 2.5" · 20gal+
Silvertip Tetra

Silvertip Tetra

Hasemania nana

Semi-aggressive Freshwater 2" · 15gal+
Similis Shell Dweller

Similis Shell Dweller

Neolamprologus similis

Semi-aggressive Freshwater 1.5" · 10gal+
Six Line Wrasse

Six Line Wrasse

Pseudocheilinus hexataenia

Semi-aggressive Saltwater 3" · 30gal+
Skunk Clownfish

Skunk Clownfish

Amphiprion akallopisos

Peaceful Saltwater 4" · 20gal+
Skunk Corydoras

Skunk Corydoras

Corydoras arcuatus

Peaceful Freshwater 2" · 15gal+
Snakehead Betta

Snakehead Betta

Betta channoides

Peaceful Freshwater 2" · 10gal+
Snakeskin Barb

Snakeskin Barb

Desmopuntius rhomboocellatus

Peaceful Freshwater 2" · 20gal+
Snakeskin Gourami

Snakeskin Gourami

Trichopodus pectoralis

Peaceful Freshwater 8" · 30gal+
Snowball Pleco

Snowball Pleco

Hypancistrus inspector

Peaceful Freshwater 6" · 30gal+
Snowflake Moray Eel

Snowflake Moray Eel

Echidna nebulosa

Semi-aggressive Saltwater 24" · 55gal+
Socolofi Cichlid

Socolofi Cichlid

Pseudotropheus socolofi

Semi-aggressive Freshwater 4.5" · 55gal+
Solar Fairy Wrasse

Solar Fairy Wrasse

Cirrhilabrus solorensis

Peaceful Saltwater 4" · 50gal+
Spanner Barb

Spanner Barb

Barbodes lateristriga

Peaceful Freshwater 7" · 30gal+
Sparkling Gourami

Sparkling Gourami

Trichopsis pumila

Peaceful Freshwater 1.5" · 10gal+
Spike-Tailed Paradise Fish

Spike-Tailed Paradise Fish

Pseudosphromenus cupanus

Peaceful Freshwater 2.5" · 10gal+
Spotted Blue Eye

Spotted Blue Eye

Pseudomugil gertrudae

Peaceful Freshwater 1.5" · 10gal+
Spotted Headstander

Spotted Headstander

Chilodus punctatus

Peaceful Freshwater 3.5" · 30gal+
Spotted Raphael Catfish

Spotted Raphael Catfish

Agamyxis pectinifrons

Peaceful Freshwater 6" · 30gal+
Springer's Damselfish

Springer's Damselfish

Chrysiptera springeri

Semi-aggressive Saltwater 2" · 20gal+
Springer's Dottyback

Springer's Dottyback

Pseudochromis springeri

Semi-aggressive Saltwater 3" · 20gal+
Squareback Anthias

Squareback Anthias

Pseudanthias pleurotaenia

Peaceful Saltwater 5" · 75gal+
Star Sapphire Cichlid

Star Sapphire Cichlid

Placidochromis phenochilus

Semi-aggressive Freshwater 10" · 75gal+
Stark's Damselfish

Stark's Damselfish

Chrysiptera starcki

Semi-aggressive Saltwater 3" · 20gal+
Starry Blenny

Starry Blenny

Salarias ramosus

Peaceful Saltwater 5" · 30gal+
Stars and Stripes Puffer

Stars and Stripes Puffer

Arothron hispidus

Semi-aggressive Saltwater 20" · 125gal+
Sterbai Corydoras

Sterbai Corydoras

Corydoras sterbai

Peaceful Freshwater 2.5" · 20gal+
Striped Barb

Striped Barb

Desmopuntius johorensis

Peaceful Freshwater 5" · 30gal+
Striped Raphael Catfish

Striped Raphael Catfish

Platydoras armatulus

Peaceful Freshwater 7" · 30gal+
Sunset Thicklip Gourami

Sunset Thicklip Gourami

Trichogaster labiosa

Peaceful Freshwater 3.5" · 15gal+
Sunshine Peacock

Sunshine Peacock

Aulonocara stuartgranti 'Maleri'

Semi-aggressive Freshwater 5" · 55gal+
Sunshine Pleco

Sunshine Pleco

Scobinancistrus aureatus

Semi-aggressive Freshwater 12" · 75gal+
Sven's Eartheater

Sven's Eartheater

Geophagus sveni

Peaceful Freshwater 7" · 55gal+
Swamp Barb

Swamp Barb

Puntius chola

Peaceful Freshwater 4" · 20gal+
Swordtail

Swordtail

Xiphophorus hellerii

Peaceful Freshwater 4" · 20gal+
Synodontis Petricola

Synodontis Petricola

Synodontis petricola

Peaceful Freshwater 4" · 20gal+
Tailspot Blenny

Tailspot Blenny

Ecsenius stigmatura

Peaceful Saltwater 2.5" · 10gal+
Talbot's Damselfish

Talbot's Damselfish

Chrysiptera talboti

Peaceful Saltwater 2.5" · 15gal+
Tangaroa Goby

Tangaroa Goby

Ctenogobiops tangaroai

Peaceful Saltwater 3" · 20gal+
Tasseled Filefish

Tasseled Filefish

Chaetodermis penicilligera

Peaceful Saltwater 10" · 75gal+
Texas Cichlid

Texas Cichlid

Herichthys cyanoguttatus

Aggressive Freshwater 12" · 55gal+
Thick Lipped Gourami

Thick Lipped Gourami

Trichogaster labiosa

Peaceful Freshwater 3.5" · 15gal+
Threadfin Acara

Threadfin Acara

Acarichthys heckelii

Semi-aggressive Freshwater 8" · 55gal+
Threadfin Rainbowfish

Threadfin Rainbowfish

Iriatherina werneri

Peaceful Freshwater 1.5" · 15gal+
Three Spot Cichlid

Three Spot Cichlid

Amphilophus trimaculatus

Aggressive Freshwater 14" · 75gal+
Three Spot Gourami

Three Spot Gourami

Trichopodus trichopterus

Semi-aggressive Freshwater 6" · 30gal+
Three Stripe Damselfish

Three Stripe Damselfish

Dascyllus aruanus

Aggressive Saltwater 3" · 20gal+
Three-Lined Pencilfish

Three-Lined Pencilfish

Nannostomus trifasciatus

Peaceful Freshwater 1.5" · 10gal+
Ticto Barb

Ticto Barb

Pethia ticto

Peaceful Freshwater 2" · 15gal+
Tiger Barb

Tiger Barb

Puntigrus tetrazona

Semi-aggressive Freshwater 3" · 20gal+
Tiger Watchman Goby

Tiger Watchman Goby

Cryptocentrus leucostictus

Peaceful Saltwater 4" · 20gal+
Tinfoil Barb

Tinfoil Barb

Barbonymus schwanenfeldii

Peaceful Freshwater 14" · 75gal+
Toba Betta

Toba Betta

Betta rubra

Peaceful Freshwater 2" · 10gal+
Tomato Clownfish

Tomato Clownfish

Amphiprion frenatus

Semi-aggressive Saltwater 5" · 30gal+
Trewavas Red Fin

Trewavas Red Fin

Labeotropheus trewavasae

Aggressive Freshwater 5" · 55gal+
Tropheus Moorii

Tropheus Moorii

Tropheus moorii

Aggressive Freshwater 6" · 75gal+
True Percula Clownfish

True Percula Clownfish

Amphiprion percula

Semi-aggressive Saltwater 3" · 20gal+
Turquoise Rainbowfish

Turquoise Rainbowfish

Melanotaenia lacustris

Peaceful Freshwater 4" · 30gal+
Tuxedo Urchin

Tuxedo Urchin

Mespilia globulus

Peaceful Saltwater 3" · 20gal+
Twig Catfish

Twig Catfish

Farlowella acus

Peaceful Freshwater 6" · 20gal+
Two Spot Goby

Two Spot Goby

Signigobius biocellatus

Peaceful Saltwater 3" · 20gal+
Two-Band Clownfish

Two-Band Clownfish

Amphiprion bicinctus

Semi-aggressive Saltwater 5" · 30gal+
Two-Spot Barb

Two-Spot Barb

Puntius bimaculatus

Peaceful Freshwater 3" · 20gal+
Uaru

Uaru

Uaru amphiacanthoides

Semi-aggressive Freshwater 10" · 75gal+
Umbee Cichlid

Umbee Cichlid

Kronoheros umbrifer

Aggressive Freshwater 22" · 125gal+
Umbrella Dwarf Cichlid

Umbrella Dwarf Cichlid

Apistogramma borellii

Peaceful Freshwater 2.5" · 20gal+
Upside Down Catfish

Upside Down Catfish

Synodontis nigriventris

Peaceful Freshwater 4" · 20gal+
Valentini Puffer

Valentini Puffer

Canthigaster valentini

Semi-aggressive Saltwater 4" · 30gal+
Vampire Pleco

Vampire Pleco

Leporacanthicus galaxias

Semi-aggressive Freshwater 10" · 50gal+
Vampire Shrimp

Vampire Shrimp

Atya gabonensis

Peaceful Freshwater 6" · 20gal+
Venustus Cichlid

Venustus Cichlid

Nimbochromis venustus

Aggressive Freshwater 10" · 75gal+
Volitan Lionfish

Volitan Lionfish

Pterois volitans

Semi-aggressive Saltwater 15" · 75gal+
Wartskin Frogfish

Wartskin Frogfish

Antennarius maculatus

Semi-aggressive Saltwater 4" · 20gal+
Watanabei Angelfish

Watanabei Angelfish

Genicanthus watanabei

Peaceful Saltwater 6" · 75gal+
Wheeler's Watchman Goby

Wheeler's Watchman Goby

Amblyeleotris wheeleri

Peaceful Saltwater 3" · 20gal+
Whiptail Catfish

Whiptail Catfish

Rineloricaria lanceolata

Peaceful Freshwater 4.5" · 20gal+
White Cloud Mountain Minnow

White Cloud Mountain Minnow

Tanichthys albonubes

Peaceful Freshwater 1.5" · 10gal+
White-Tail Bristletooth Tang

White-Tail Bristletooth Tang

Ctenochaetus flavicauda

Semi-aggressive Saltwater 6" · 75gal+
Whiteseam Betta

Whiteseam Betta

Betta albimarginata

Peaceful Freshwater 2" · 10gal+
Wild-Type Ember Tetra

Wild-Type Ember Tetra

Hyphessobrycon amandae (wild form)

Peaceful Freshwater 0.8" · 5gal+
Wine Red Betta

Wine Red Betta

Betta coccina

Peaceful Freshwater 1.8" · 5gal+
Wolf Cichlid

Wolf Cichlid

Parachromis dovii

Aggressive Freshwater 28" · 125gal+
Wrestling Halfbeak

Wrestling Halfbeak

Dermogenys pusilla

Semi-aggressive Freshwater 2.5" · 15gal+
X-Ray Tetra

X-Ray Tetra

Pristella maxillaris

Peaceful Freshwater 1.75" · 10gal+
Yasha Goby

Yasha Goby

Stonogobiops yasha

Peaceful Saltwater 2" · 10gal+
Yellow Assessor Basslet

Yellow Assessor Basslet

Assessor flavissimus

Peaceful Saltwater 2.5" · 20gal+
Yellow Clown Goby

Yellow Clown Goby

Gobiodon okinawae

Peaceful Saltwater 1.5" · 10gal+
Yellow Coris Wrasse

Yellow Coris Wrasse

Halichoeres chrysus

Peaceful Saltwater 5" · 30gal+
Yellow Lab

Yellow Lab

Labidochromis caeruleus

Semi-aggressive Freshwater 4" · 30gal+
Yellow Tail Acei

Yellow Tail Acei

Pseudotropheus acei

Semi-aggressive Freshwater 6" · 55gal+
Yellow Tang

Yellow Tang

Zebrasoma flavescens

Semi-aggressive Saltwater 8" · 75gal+
Yellow Watchman Goby

Yellow Watchman Goby

Cryptocentrus cinctus

Peaceful Saltwater 4" · 20gal+
Yellowtail Damselfish

Yellowtail Damselfish

Chrysiptera parasema

Semi-aggressive Saltwater 2.5" · 20gal+
Yoyo Loach

Yoyo Loach

Botia almorhae

Semi-aggressive Freshwater 6" · 30gal+
Zebra Danio

Zebra Danio

Danio rerio

Peaceful Freshwater 2" · 10gal+
Zebra Loach

Zebra Loach

Botia striata

Peaceful Freshwater 3.5" · 20gal+
Zebra Moray Eel

Zebra Moray Eel

Gymnomuraena zebra

Peaceful Saltwater 36" · 75gal+
Zebra Pleco

Zebra Pleco

Hypancistrus zebra

Peaceful Freshwater 3.5" · 20gal+