Definition
A squirrelfish is a type of ray-finned fish belonging to the family Holocentridae. They are known for their reddish coloration, large eyes, and spiny fins. Think of them as the nocturnal guards of the coral reef. During the day, they hide in caves and crevices, emerging at night to hunt for small invertebrates. They make clicking or grunting sounds. Their bright colors and nocturnal habits make them a popular subject for underwater photographers.