Ecsenius bicolor
Source: JJPhoto.dk
Ecsenius bicolor
Source: S├ębastien Stradal for MDC Seamarc Maldives / CC BY-SA 4.0

Facts

Latin name Ecsenius bicolor - (Day, 1888)
Common name Bicolor blenny
Family Blenniidae - Ecsenius
Origin East Indian Ocean, West Indian Ocean, Australia, Indonesia, East Pacific, Central/West Pacific
Max length 11.0 cm (4.3")

As aquarium fish

Minimum volume 300 l (79 gal)
Hardiness Hardy
Suitable for aquarium Suitable for most aquarium
Reef safe Often reef safe
Aggressiveness Mostly peaceful but might be aggressive towards similar species

Food

Recommended
  • Microalgea (Eg. spirulina)
  • Zooplankton (Cyclops, pods...)
  • Small crustaceans (Krill, mysis, artemia...)

Jumps out of open aquaria

This species is known to jump out of open aquaria.

Can nibble at clams

This species sometimes nibbles at clams including Tridacna species.

Well established aquarium with algae

These fish should be kept in a well run aquarium where they can "graze" algae from rocks and stones.

If there are insufficient algae on the rocks, it is important to feed more frequently and supplement with algae rich food e.g. Spirulina. 

Thrive best on their own

These fish flourish better without other members of the same species in the aquarium.

Algae Eaters

Even though these fish enjoy a diverse type of frozen foods, it is imperative that its primary food, is algae based, thus ensuring that the fish`s immune system remains healthy.

This can, for example, be plant based fish flakes, Nori seaweed or similar.

Personality

This species often has a fun and interesting personality.

Hiding places

This species needs good hiding places, for example, between live rocks.

Genus description (Ecsenius)

Fish in the Ecsenius genus are very popular for fishtanks, normally easy to look after and fitting well in most aquaria.

Family description (Blenniidae)

There are many differences within the Toothcomb Blennies family, some eat algae whilst others eat zooplankton. There are many families of Blennies, this is merely one of them.

What they have in common are their oblong shape and long dorsal fin. Some species have small "legs" used to move around the bottom.

These Blennies do not normally get very big and are therefore a good choice for both small and large aquaria. They are not often very colorful, but many have a fun personality which many aquarists fall for.

The species of the families Aspidontus and Plagiotremus imitate Cleaner Wrasses and can therefore be difficult to identify.

FishBase

Aquarium trade Yes
Distribution Indo-Pacific: Maldives to the Phoenix Islands, north to Ryukyu Islands, south to the southern Great Barrier Reef; throughout Micronesia.
English common names Two-colored blenny, Bicolor combtooth blenny, Bicolor blenny, Bicolor coralblenny
Danish common names Tofarvet slimfisk

References and further reading

About references

Bob Fenner. Combtooth Blennies of the Genus Ecsenius - Wet Web Media - (English)

Jeff Kurtz. 2007. Combtooth Blennies: Bewitching Bottom Dwellers - Tropical Fish Hobbyist - (English)
Scott W. Michael. Reef Aquarium Fishes: 500+ Essential-to-know Species - TFH Publications / Microcosm Ltd. - (English)
Bob Fenner. The True/Combtooth Blennies, Family Blenniidae - Wet Web Media - (English)
Bob Fenner. Blennioids: Blennies and Blenny-Like Fishes - Wet Web Media - (English)

Froese, R. and D. Pauly. Editors. 2014. FishBase. World Wide Web electronic publication. www.fishbase.org, version (08/2014).

Tags

herbivore, algae eater, eats tridacna, blenny
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