Bicolor Blenny

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Ecsenius bicolor

The Bicolor Blenny or Two-colored Blenny, is a small, peaceful, and colorful fish belonging to the family Blenniidae. These fish are often found in the Indo-Pacific region, particularly in the coral reefs around areas like the Red Sea, the Maldives, and the western Pacific Ocean.

The Bicolor Blenny has a slender body with a blunt head and continuous dorsal fin. As their name suggest, their body displays a distinct coloration of bright yellow to yellow orange on the anterior and deep blue to black on the posterior. 

They are a bottom dwelling fish that often inhabits crevices and small holes with the reef.  They are known to be relatively peaceful and can be kept in a reef aquarium with causing harm to corals, inverts, or other tank inhabitants.  They can exhibit territorial behavior towards similar-looking species.

Overall, the Bicolor Blenny is a popular choice for marine aquarium enthusiasts due to its striking coloration, peaceful nature, and relatively easy care requirements. It's important to ensure suitable tank conditions, appropriate tank mates, and a varied diet to keep these fish healthy and thriving in a captive environment.

As with all marine fish, they benefit from a varied diet of vitamin enriched foods consiting of high-quality flake foods, pellets, frozen or live food like brine shrimp, and algae-based preparations. Blennies will also benefit greatly from live phytoplankton which is readily available to them in the wild.