About
Bright yellow from nose to tail — a tang you can recognize at a glance. It spreads its sail-like dorsal and anal fins and grazes on algae around the reef.
At the base of its tail is a sharp white spine, a surgeonfish trademark. At night its color dulls a little and a pale band appears along its side.
In Fish Around
It floats along on its sail-like fins, gliding smoothly and turning sharply every few seconds.