Lawnmower Blenny

Lawnmower Blenny

Salarias fasciatus

Also known as: Jewelled Blenny, Algae Blenny

🧂 Saltwater ✌️ Peaceful 🟢 Easy 🌿 Herbivore Reef Safe

The reef tank's lawn mower. Constantly grazes on hair algae and film algae on rocks, glass, and sand.

Tank Size

30 gal
minimum (55+ preferred)

Temperature

74–82°F
23–28°C

pH Range

8–8.4
water acidity

Max Size

5"
12.7 cm

Lifespan

5–8 years
typical in captivity

Swim Level

Bottom
preferred zone

Care Notes

Excellent algae eater. Can starve in too-clean tanks — supplement with nori. Fun personality, constantly 'mowing' the rocks.

Feeding

Algae (primary food), nori sheets, and spirulina. Supplement if tank is too clean.

Compatible Tank Mates

Blue Green Chromis 3" Pink Skunk Clownfish 3.5" Skunk Clownfish 4" Orange Skunk Clownfish 4.5" Talbot's Damselfish 2.5" Lubbock's Fairy Wrasse 3" Melanurus Wrasse 5" Cleaner Wrasse 4" Yellow Coris Wrasse 5" Carpenter's Flasher Wrasse 3" Firefish Goby 3" Yellow Watchman Goby 4"

Use Caution With

Ocellaris Clownfish 3" True Percula Clownfish 3" Yellowtail Damselfish 2.5" Blue Tang 12" Yellow Tang 8" Kole Tang 7" Clarkii Clownfish 5" Tomato Clownfish 5" Scopas Tang 8" Naso Tang 18" Convict Tang 8" Azure Damselfish 2.5"

Incompatible With

Maroon Clownfish 6" Blue Devil Damselfish 3" Powder Blue Tang 9" Achilles Tang 10" Purple Tang 10" Three Stripe Damselfish 3" Domino Damselfish 5" Four Stripe Damselfish 3" Jewel Damselfish 6" Clown Tang 15" Catalina Goby 2.5" Volitan Lionfish 15"

Check Compatibility

Want to check if Lawnmower Blenny is compatible with a specific fish? Use our compatibility checker to build your complete tank.