Salarias fasciatus

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Common Name
Lawnmower Blenny
Binomial Name
Salarias fasciatus
Salarias fasciatus.jpg
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Blenniidae
Genus: Salarias
Species: fasciatus

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Common Names

  • Lawnmower Blenny
  • Jewelled Blenny
  • Algae Blenny



A very popular algae eating blenny, typically mottled brown, grey and white in colour with a single continous dorsal fin across its entire body and delicate antennae like appendages on its head known as "cirri", the common name "Lawnmower Blenny" was aquired from its ability to "mow down" unwanted algea.

Similar Species

Maximum Size

13 cm [1]

Associated Organisms

Anything that lives in sybiosis, parasitic or opportunistically with it.


A very personable and inquisitive fish, when not grazing on algae they spend most of their time perched on rocks. Best not kept with other species of blennies as they will become very territorial and aggresive especially as they mature.

Captive Care

Tank Size

120 Litres minimum or more to sustain substantial amounts of algae for them to naturally feed on.

Water Flow





In the wild feeds on filamentous algae [1]

They require large amounts of natural algae to feed on, if algae is scarce in your system it is essential to supplement feeding with prepared or commercially available herbivore foods.

Growth Rate

How quickly it will grow under various conditions.


Things that adversely effect it, such as bacterial infections, parasites etc.





Best not housed with other types of blennies as they become territorial and aggresive.


Usually considered reef safe but has been known to nip at some SPS and clam mantles


Invertabrate friendly.


How it reproduces, how suitable it is to breeding or captive propagation, techniques on how to etc.

Local Ecology


Red Sea to Samoa, north to Ryukyu Islands and south to Great Barrier Reef and New Caledonia [1].


Areas of mixed coral, sand and rubble of reef flats and shallow lagoon and seaward reefs to 8 m [1].

Additional Information

Some additional notes on it that don't fit in the above sections.



  1. 1.0 1.1 1.2 1.3 (Lieske Myers 1996): Lieske, E., Myers, R., Coral reef fishes : Caribbean, Indian Ocean, and Pacific Ocean : including the Red Sea, Princeton University Press: Princeton, 1996.