Lawnmower Blenny

The Lawnmower Blenny (Salarias fasciatus) is a hardy and beneficial marine species known for its algae-grazing behavior. This fish is a popular addition to reef tanks due to its ability to control nuisance algae while displaying a unique personality.

(REEF SAFE / BEGINNER)

Essential Information:

• Common Names: Lawnmower Blenny, Algae Blenny, Jeweled Blenny
• Scientific Name: Salarias fasciatus
• Family: Blenniidae
• Origin/Habitat: Found in the Indo-Pacific, including coral reefs and rocky coastal areas with abundant algae.
• Maximum Size: Up to 5 inches (13 cm)
• Lifespan: Typically 5–7 years with proper care
• Level of Difficulty: Beginner-friendly; thrives in well-established aquariums with sufficient algae growth.

Appearance & Physical Traits:

• Coloration & Pattern: Mottled brown and white coloration with intricate markings for camouflage.
• Body Shape & Structure: Elongated body with a blunt head, large eyes, and a distinct fringe of cirri above the eyes.

Habitat & Environmental Needs:

• Minimum Tank Size: 30 gallons (113 liters) or larger.
• Water Temperature: Maintain between 74°F and 80°F (23°C to 27°C).
• pH Level: Keep between 8.1 and 8.4.
• Specific Gravity: Optimal range is 1.023 to 1.025.
• Aquascape: Provide live rock with plenty of grazing surfaces and hiding spots.

Diet & Feeding:

• Diet Type: Herbivorous
• Preferred Foods: Primarily consumes filamentous algae, but will also accept spirulina, nori, and algae-based pellets or wafers.
• Feeding Frequency: Feed daily, ensuring a continuous supply of algae or supplemental plant-based foods.

Behavior & Compatibility:

• Temperament: Generally peaceful but may become territorial towards similar species.
• Social Behavior: Best kept singly unless in a large system with abundant food.
• Tank Mate Compatibility: Compatible with most peaceful marine fish; avoid housing with overly aggressive tank mates.
• Activity Level: Active during the day, frequently perching on rocks and grazing on algae.

Care Considerations & Additional Notes:

• Ease of Care: A great choice for beginner aquarists looking for a natural algae controller.
• Special Requirements: Requires a well-established tank with ample algae growth to sustain its diet.
• Breeding Info: Rarely bred in captivity; little is known about its reproductive behavior.
• Additional Notes: The Lawnmower Blenny is reef-safe and will not harm corals or invertebrates, but may occasionally nip at fleshy corals if underfed.