The Bicolor Blenny, Ecsenius bicolor, has a bisecting color pattern with the front half being a blue to pale brown color and the back half is orange/yellow. They are hardy and can be housed with other peaceful fish in a reef tank setting, but may become territorial towards other blennies, gobies or dartfish in smaller tanks.

This blenny will stay mainly towards the bottom of the tank, searching for algae to graze on in between meals. Diet should include a variety of spirulina, marine algae, and seaweed and algae based foods 2-3 times daily.