Lawnmower Blenny

Lawnmower Blenny (Salarias fasciatus): Hardy, algae‑grazing blenny with a mottled tan‑to‑green body, expressive cirri above the eyes, and a comical “perched” posture Typically reaches 4–5 inches One of the most effective natural film‑algae and microalgae grazers for reef tanks Peaceful, full of personality, and highly active during the day Origin & Habitat Native to the Indo‑Pacific, including Fiji, Indonesia, and the Great Barrier Reef Found on shallow reef flats and rubble zones Spends most of its time perched on rock surfaces grazing algae Temperament & Reef Safety Peaceful and reef‑safe May show mild territorial behavior toward other blennies in smaller tanks Does not harm corals or invertebrates Excellent for controlling nuisance film algae Tank Requirements Minimum 30 gallons Provide abundant live rock for grazing Stable water parameters: 72–78°F, pH 8.1–8.4, salinity 1.023–1.025 Moderate flow preferred Tight lid recommended — occasional jumper Diet Primarily herbivore Grazes film algae, diatoms, and microalgae throughout the day In low‑algae tanks, supplement with: Spirulina pellets Nori Algae wafers High‑quality herbivore blends May take time to accept prepared foods Compatibility Works well with peaceful reef fish Avoid mixing with other algae‑grazing blennies unless the tank is large Safe with corals, snails, hermits, and shrimp Why Hobbyists Love It One of the best natural algae‑control fish Tons of personality — expressive face, quirky movements, and constant grazing Hardy and adaptable Great for reef tanks needing film‑algae management