Lawnmower Blenny
Salarias fasciatus
Water Parameters
About
The Lawnmower Blenny gets its name from its ability to scrape algae off live rock like a lawnmower. Its mottled body in shades of green, brown, and beige with tentacles above the eyes gives it a charismatic and comical appearance. It is one of the best biological algae controllers for marine aquariums.
Behavior & Temperament
A peaceful, devoted algae‑grazing fish that patrols live rock, constantly scraping. It is territorial toward other herbivorous blennies. Its facial expressions are comical, with large, bulging eyes.
Feeding
Strict herbivore. Feeds almost exclusively on microalgae and biofilm scraped from rock. May accept spirulina, nori and algae-based flakes as supplement. May starve in very clean tanks without algae growth.
Breeding
Oviparous. Male prepares a nest in a cavity. He guards and aerates the eggs. Breeding is possible in an aquarium.
Care Notes
Abundant live rock with algal growth. In very clean aquariums (no algae), they may go hungry – supplement with nori and spirulina. One specimen per aquarium. Do not combine with other herbivorous blennies.
Compatibility
Peaceful with almost all reef fish. Territorial with other herbivorous blennies. Excellent controller of filamentous algae. Does not attack other fish.
Quick Summary
| Scientific Name | Salarias fasciatus |
|---|---|
| Family | Blenniidae |
| Category | Fish |
| Care Level | Beginner |
| Water Type | Freshwater |
| Max Size | 12.0 cm (4.7") |
| Min Tank | 150 L (40 gal) |
| Min Group | 1+ |
| Diet | Strict herbivore. Feeds almost exclusively on microalgae and biofilm scraped from rock. May accept spirulina, nori and algae-based flakes as supplement. May starve in very clean tanks without algae growth. |
| Temperament | A peaceful, devoted algae‑grazing fish that patrols live rock, constantly scraping. It is territorial toward other herbivorous blennies. Its facial expressions are comical, with large, bulging eyes. |
Track this species in your aquarium
Create a free account to add Lawnmower Blenny to your tank and get personalized care tips.
Create Free Account