It isn’t difficult to figure out how the bicolor blenny earned its name. The front half of this little fish ranges in color from brown to blue. And the back? It’s a bright orange-yellow. The slim, eel-like silhouette makes for a striking look that stands out in a reef tank nicely. And, of course, how can anyone resist thecirrithat stand out above their bulging eyes? They’re cute little aliens, hopping from rock to rock in search of the next patch of algae.
Male bicolors undergo color changes throughout their lives. During the spawning season, the anterior (front) half turns a vibrant blue to attract females. And while both sexes have a continuous dorsal fin, it extends a bit further down the tail in males. If you take a closer peek, you’ll also note thicker “lips” on their faces. Considering they’re smaller fish, though, that might require a magnifying glass (and a patient specimen).
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