Wolf-fish. Marine catfish. A fish of northern waters. It is medium oily and white-fleshed. Since it eats shellfish, its own flavour is good. Its jaws are strong and it has a blunt head which lend to its unattractive appearance, which is why it is normally sold filleted or in cutlets. It has few small bones and can be prepared in the same way as monkfish (US: angler fish), in stews or grilled. It is sometimes sold as rock salmon or rock turbot.