Yellowmouth rockfish are a species of slope rockfish found on Canada's Pacific coast. They range from the Gulf of Alaska to northern California. In Canada, they are most abundant off the northern coast of Vancouver Island and in Queen Charlotte Sound, typically living at depths of 100 to 400 metres. A major commercial fishery exists, with yellowmouth rockfish considered second only to ocean perch in commercial importance as rockfish.

Yellowmouth rockfish have a short, stocky body with a sloping forehead and a large head. They have a wide, gaping mouth and large eyes. On their dorsal side they have a series of sharp spines immediately followed by softer and finer rays. Their tail fin is pointed and slightly indented. Yellowmouth rockfish can grow to a maximum length of about 60 centimetres and can live for at least 70 years, possibly as long as a century.