The Trigger Fish can be found in great numbers in the Indo-Pacific, especially at coastal areas or in coral reefs. This gorgeous fish features an oval-shaped body and a large head that includes a small but very powerful mouth that it uses to crush shells. Even though some fish are widely known to have a very short-term memory, the Trigger Fish is surprisingly intelligent and can even learn from past experiences. Its diet consists of mostly sea urchins, mollusks and crustaceans, but some species will also eat small fish, plankton or algae.