|Squirrelfishes are small shallow-water reef fishes that are predominantly red, sometimes with yellow stripes on the body and fins. Their heads are bony with strong spines on the preopercle and opercle. These fishes are nocturnal and hide in crevices or shadows during the day. Their eyes are large which allows more light in and helps them adapt to nocturnal living. They can produce sounds which are usually used as part of their courtship rituals. Because of their small size, they are not usually commercially fished, but they are important subsistence food fishes in many areas of the world.