Ecsenius bicolor

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See Talk:Ecsenius bicolor for individual experiences with this species, Ecsenius bicolor. Feel free to add your own personal experiences.

Common Name
Bicolor Blenny
Binomial Name
Ecsenius bicolor
Ecsenius bicolor 01.jpg
Scientific Classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Blenniidae
Genus: Ecsenius
Species: bicolor

Common Names

  • Bicolor Blenny



A long, narrow fish almost eel like. The back half of it's body is bright yellow while the front half is dark grey. Lighter coloured stripes can be seen on the sides and head area at different times especially when asleep at night.

Similar Species

Any species that look similar to this one, that may be mixed up.

Maximum Size

These fish grow to approx. 8-10cm in length

Associated Organisms

None known


Peaceful, reef safe fish that can be very entertaining. These fish perch on the rockwork or, when nervous, reverse into holes in the rock. This fish spends a lot of time studying you watching it.

Captive Care

Tank Size

As always, the bigger the better however the bicolor could live comfortably in a 45 litre, 2x1x1 tank. It is quite happy to stay in one area but will swim the length of the tank a few times a day.

Water Flow

Can easily handle the high water flows of most reefs but doesn't require them.


No specific requirements known.


An omnivore that likes to graze some algaes, this fish will readily take to many different types of food from dry flake and pellet foods to frozen foods and shrimps.

Growth Rate

The bicolor blenny grows rapidly in average reef tank conditions and with a varied diet.


Diseases are not commonly seen in these fish however they would still be quite able to catch a contagious disease.


These fish need rockwork or somewhere to hide and sleep.




This blenny should not be housed with other blennies in smaller tanks.


The bicolor blenny is totally safe with coral and has not been seen to nip them.


It is safe with all invertebrates.


There is no known visual difference between male and females. They have not been bred in captivity yet.

Local Ecology


Which oceans and reefs it is found.


Where it is found on the natural reefs, the reef zone.

Additional Information

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