Fish
Bicolor Blenny
Ecsenius bicolor · also called two-colored blenny
Darting briefly out from a small burrow to graze a patch of algae, a bicolor blenny flashes its clean split of dark front and warm orange rear before quickly retreating back to the safety of its shelter.
Overview
The bicolor blenny, Ecsenius bicolor, is native to ocean and coastal reef habitat across the Indo-Pacific region. Its distinctive two-toned colour division, cautious burrow-sheltering lifestyle, and territorial defence of its chosen shelter make it one of the most visually simple yet behaviourally consistent small blennies found on Indo-Pacific reefs.
A life measured in quick trips
The bicolor blenny’s entire daily routine revolves around short, cautious trips away from its burrow to feed, always staying close enough to retreat the instant anything on the reef looks even slightly threatening.
Status
Least Concern, remaining widespread across suitable reef habitat throughout the Indo-Pacific region.
Bicolor Blenny: common questions
Why is it called the bicolor blenny?
It displays a clean division between a dark brown or black front half and an orange or tan rear half, a two-toned pattern that gives the species its common name.
Where does the bicolor blenny live?
It shelters in a small burrow or an empty shell on the reef floor, darting out briefly to feed before quickly retreating back to safety.
Can the bicolor blenny change its colouring?
It can adjust its colour pattern somewhat depending on mood or surrounding conditions, though it generally retains its characteristic two-toned appearance.
Where is the bicolor blenny found?
It is native to ocean and coastal reef habitat across the Indo-Pacific region.