Triggerfish
family Balistidae, about 40 species of often brightly colored fishes / From Wikipedia, the free encyclopedia
Triggerfish are about 40 species of often brightly colored fish of the family Balistidae. Triggerfish are native to tropical waters. A prehistoric pufferfish called Zignoichthys bore a resemblance to them.
Most are found in shallow, coastal habitats, especially at coral reefs, but a few, such as the ocean triggerfish are pelagic. Triggerfish are very popular in the marine aquarium trade. However, they are often grumpy.
There are reports that triggerfish have attacked humans due to them being territorial, but these attacks are extremely rare.