The yellowtail rockfish (Sebastes flavidus), or yellowtail seaperch, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. This species lives mainly off the coast of western North America from California to Alaska.

Sebastes flavidus, commonly known as the Yellowtail Rockfish, is a species of rockfish characterized by its vibrant yellow tail and robust body structure. Found along the Pacific coast of North America, this fish inhabits rocky reefs and kelp forests, displaying a remarkable ability to adapt to various depths and temperatures.