Grouper

Grouper, sea fish of the sea bass family with large mouth and sharp teeth, mainly of tropical seas. Groupers are as small as 1 in (2.5 cm) long; the Queensland grouper of the Great Barrier Reef grows up to 7 ft (2 m) and can be a danger to skindivers. The Nassau grouper of the coasts of the southeastern states is noted for its ability to change color.