Lawnmower Algae Blenny - Salarias fasciatus
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The Lawnmower Algae Blenny (Salarias fasciatus) is an active and hardy marine fish known for its voracious appetite for algae. With a mottled brown body and charismatic personality, this blenny is highly valued for its natural algae control in reef aquariums.
Common Name: Lawnmower Algae Blenny
Scientific Name: Salarias fasciatus
Family: Blenniidae
Size: Up to 4 inches (10 cm)
Temperament: Peaceful
Difficulty: Easy
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific, including the Red Sea, Indonesia, and the Philippines, typically inhabiting rocky reefs, lagoons, and coral-rich areas with abundant algae.
Tank Size: Minimum of 30 gallons
Temperature: 72–78°F (22–26°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Live rock aquascape with plenty of crevices and algae-covered surfaces for grazing.
• Algae Control: Actively grazes on hair algae, film algae, and diatoms, making it an effective natural cleaner.
• Behavior: Peaceful and hardy; spends most of its time on rock surfaces grazing.
• Diet: Herbivorous—supplement grazing with marine algae sheets or spirulina-based foods to ensure balanced nutrition.
• Tankmates: Compatible with most peaceful reef fish; avoid aggressive species that may outcompete it for food.