The clown triggerfish sports a bold pattern of large white spots on black that's unique in the marine world; it can move each eye independently, keeping watch over its territory while searching for food.
What defines this group — Reef fish
The bony fish that live against coral and rock: the living backdrop of almost every dive.
A bony skeleton, scales, and a rigid gill cover closing over the gills.
A swim bladder acts as a float: they hold their depth without swimming.
Many change colour, pattern — sometimes even sex — over the course of their life.