Copper rockfish are known to be highly variable in coloration, ranging from a dark reddish brown, with pale copper blotching along the sides, to a lighter pinkish brown with a yellowish white mottling on the flanks. At one time it was thought that these variations were two different fish: Sebastes caurinus and Sebastes vexillaris - this is due to the northern and southern populations having different coloration (northern individuals having brown or olive coloration while southern individuals are closer to dull yellow or olive-pink). It is now known, however, that it is simply one species. Copper rockfish are known to create and communicate with sound produced using the swimbladder and associated muscles; these sounds are used for agonistic behaviors, including territory defense. The copper rockfish is a relatively common rockfish of the Pacific coast. It is very widespread in its distribution, known from the very northern reaches of the Gulf of Alaska, to the Pacific side of the Baja California peninsula, north of Guerrero Negro. The copper rockfish is also very widely distributed in depth, from the subtidal shallows of about 10 to 183 metres (33 to 600 ft). It is a demersal fish which occurs in rocky areas with high relief. Max length : 58 cm; max. weight: 2.7 kg
