What Divers Should Know About
Copper Sweeper

The Copper sweeper, Sebastes caurinus, is a captivating presence across the eastern Pacific, with a distribution stretching from the Gulf of Alaska down to the Baja California peninsula. Divers will note its highly variable coloration, which ranges from a dark reddish-brown with pale copper blotching to a lighter pinkish-brown with yellowish-white mottling, often adapting to blend with its surroundings. Northern populations tend towards brown or olive hues, while those further south might display dull yellow or olive-pink. These are robust fish, capable of reaching up to 66 centimeters (26 inches) in length and living for over four decades, with some individuals surpassing 55 years.

You'll typically encounter adult Copper sweepers settled close to the bottom, almost always nestled in rocky areas with significant relief, rather than open sand. They are demersal, favoring the complex shelter that rocks provide, from shallow subtidal zones down to considerable depths of 183 meters (600 feet). Interestingly, these fish exhibit strong fidelity to a chosen home range; tagging studies reveal they rarely venture more than a mile from their preferred spot. While generally stationary, Copper sweepers communicate using sounds produced by their swimbladder, particularly for territory defense against other fish.