Yellowtail Surgeonfish

Least concern.
Categories and criteria of the IUCN Red List:

It is vegetarian. It eats seasonal algae. As an herbivore, its intestine is longer than carnivore fish, and its stomach is muscular, like a gizzard.

It behaves diplomatically: it uses its stemmed spine to slap other fish, in order to resolve territorial matters.

This compressed, oval-shaped fish has its eyes positioned high on its head. It is grey in color, with small black specks and a bright yellow tail.

It can be found in shallow reefs, in schools (groups of fish).

It feeds on algae found on rocks.