Size: Up to 20 inches long.
Range: Found in the western Pacific and Indian oceans, most commonly along external reef slopes.
Diet: Crustaceans, mollusks and echinoderms (which include animals like sea stars, sea urchins, sea cucumbers and sand dollars).
Fast facts: Triggerfish get their names from the fact that their first three dorsal spines are adapted in such a way that the first one, which is very strong, can be braced into an upright position by the second, allowing the animals to lock themselves into holes. When they want to come back out, the second spine acts as the “trigger” to unlock the first.