The blue triggerfish or rippled triggerfish, Pseudobalistes fuscus, is a brilliant blue color. This fish is known for its aggressiveness and many divers choose to stay away from them, as they bite often. The blue triggerfish is a tropical fish, swimming in the Indo-Pacific and the Red Sea. It can be found in coastal waters, shallows in the open, 10-165 ft (3-50 m). It measures 22 in (55 cm) long. The blue triggerfish, like most other triggerfish, eats shellfish, small crustaceans, and other bottom-dwelling invertebrates.