
Source: Wikimedia Commons
Salarias fasciatus
A blenny that eats algae and cleans tank. Popular for humorous facial expression.
Salarias fasciatus, commonly known as the jewelled blenny or lawnmower blenny is a benthic, neritic, marine fish species endemic to Australasia. Despite being known as the lawnmower blenny, due to its propensity to consume algae growth in aquaria, it is principally a detritivore, with plant material making up only about 15% of its diet. The lawnmower blenny camoflauges itself with its surroundings, even changing color to hide from predators.
Source: Wikipedia (CC BY-SA 4.0)
Origin
Australasia
Lifespan
4-6 years
Size
10-13cm
Temperature
23〜26℃
Algae, Pellets
Specific gravity 1.023-1.025
Maintain 24-26°C
May fight with same species
Sources: LiveAquaria
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / 環境省 特定動物リスト / 環境省 特定外来生物等一覧
Regulations may change. Always verify the latest information with the relevant authorities.
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Starves without algae, train to eat pellets
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Lawnmower Blenny is 23〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Lawnmower Blenny is 4-6 years. With proper care and nutrition, they can live a long and healthy life.
Lawnmower Blenny typically reaches 10-13cm as an adult. Size may vary depending on care conditions and individual genetics.
Lawnmower Blenny feeds on: Algae, Pellets. Aim for a balanced diet with appropriate feeding frequency.
The price of Lawnmower Blenny varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026