The Nassau grouper is a reef fish. It is a member of the family Serranidae, which includes groupers valued as a major fishery resource such as the gag grouper and the red grouper. These large fish are associated with hard structure such as reefs (both natural and artificial), rocks, and ledges. They are late-maturing, long-lived, top-level predators found in southern coastal Florida, the Florida Keys, Bermuda, the Yucatan, and the Caribbean Sea.