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.
The yellowtail rockfish was first formally described as Sebastodes flavidus in 1862 by the American ichthyologist William Orville Ayres with the type locality given as San Francisco, California. Some authorities place this species in the subgenus Sebastosomus. The specific name flavidus means “yellowish”, thought to be a reference to the “yellowish green” colour on the flanks, which Ayres said easily differentiates this species “as they lie in heaps upon the fish-stalls” from the “closely allied” black rockfish (S. melanops) Some authorities suggest that the name refers to the “bright yellow tail,” but the tail was not described by Ayres.
The yellowtail rock f