Reef Squirrelfish

Found singly, or in small schools, during the day sheltering in deep crevices, and between branches of live corals, dispersing at night foraging for food, over coral, rock, and sandy bottoms, of seaward reefs.
They feed nocturnally on crustaceans.

Squirrelfish are nocturnal hunters feeding near the bottom on small fish and swimming crustaceans. During the day they often congregate close to reefs and in caves, sometimes found upside down in caves.
Their colour can change greatly in different lights and if threatened.
Some of this family have venomous spines.