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The Lawnmower Blenny is a highly popular and functional reef fish best known for its constant grazing behavior and quirky personality. With its mottled brown and tan coloration and expressive facial features, this blenny adds both utility and character to established reef aquariums.
Renowned for its appetite for nuisance algae, the Lawnmower Blenny spends much of the day perched on rocks and glass, actively grazing on microalgae and biofilm. Its peaceful nature and small size make it a great addition to community reef systems. Once acclimated, it is hardy and engaging, often becoming a favorite due to its bold, interactive behavior.
This species does best in mature aquariums with ample natural algae growth and supplemental feeding to ensure long-term health.
Scientific Name: Salarias fasciatus
Common Name: Lawnmower Blenny
Care Level: Beginner to Intermediate
Temperament: Peaceful
Reef Safe: Yes
Minimum Tank Size: 30 gallons
Adult Size: ~5 inches
Diet: Herbivore (natural algae, nori, spirulina-based foods, occasional pellets)
Feeding Frequency: 1–2 times daily (supplement as needed)
Lighting Requirement: Moderate
Water Flow: Moderate
Temperature: 72–78°F
Salinity: 1.024–1.026 SG
pH: 8.1–8.4
Compatibility Notes: Peaceful with most reef-safe fish; may show territorial behavior toward similar blennies.
Special Requirements: Requires an established tank with sufficient algae growth; monitor weight to ensure adequate nutrition.
The Lawnmower Blenny is a highly popular and functional reef fish best known for its constant grazing behavior and quirky personality. With its mottled brown and tan coloration and expressive facial features, this blenny adds both utility and character to established reef aquariums.
Renowned for its appetite for nuisance algae, the Lawnmower Blenny spends much of the day perched on rocks and glass, actively grazing on microalgae and biofilm. Its peaceful nature and small size make it a great addition to community reef systems. Once acclimated, it is hardy and engaging, often becoming a favorite due to its bold, interactive behavior.
This species does best in mature aquariums with ample natural algae growth and supplemental feeding to ensure long-term health.
Scientific Name: Salarias fasciatus
Common Name: Lawnmower Blenny
Care Level: Beginner to Intermediate
Temperament: Peaceful
Reef Safe: Yes
Minimum Tank Size: 30 gallons
Adult Size: ~5 inches
Diet: Herbivore (natural algae, nori, spirulina-based foods, occasional pellets)
Feeding Frequency: 1–2 times daily (supplement as needed)
Lighting Requirement: Moderate
Water Flow: Moderate
Temperature: 72–78°F
Salinity: 1.024–1.026 SG
pH: 8.1–8.4
Compatibility Notes: Peaceful with most reef-safe fish; may show territorial behavior toward similar blennies.
Special Requirements: Requires an established tank with sufficient algae growth; monitor weight to ensure adequate nutrition.