Genus Polyprion is a taxonomic classification that refers to a group of fish in the family Polyprionidae. There are several synonyms that are used to describe this genus, including the common name for these fish, which is the hapuku. Other synonyms include Sebastes sio, Sebastes sio mackii, and Parathinoides tetracanthus. The genus Polyprion is found in the southern hemisphere, primarily in Australia, New Zealand, and South America. These fish are highly prized for their firm, white meat, and are often used in gourmet cuisine. They can grow to be quite large, with some individuals reaching up to 150 pounds.