Scorpididae

The Scorpididae, commonly known as halfmoons, knifefishes, and sweeps, are a family of marine centrarchiform fish in the suborder Terapontoidei. In the past, they were considered a subfamily of the Kyphosidae, but they are now treated as their own family.

They are distributed throughout the Pacific and east Indian Oceans, with species occurring in the waters of North America, South America, Asia, Australia, and numerous islands. Most inhabit the continental shelf in shallow rock and kelp reefs and deeper offshore reefs, whilst others are found well offshore in a pelagic setting. Most of the Scorpidinae are carnivorous, taking a variety of small crustaceans, although some are partly herbivorous. A number of the larger species are fished commercially and recreationally, and are considered good table fish.