Blue whiting. This fish can develop a sour taste so it is less frequently eaten and is usually used for fish meal.
Bluemouth. A type of rascasse from deep North American waters and the western Mediterranean. It has a blue flash on the gill covers and enormous eyes. It is an unsightly fish with good flavour and is used in bouillabaisse and other fish soups.
Greenland halibut (US: Greenland turbot). A chicken halibut, or smaller version of the huge, side-swimming flatfish found in the deep waters of the North Atlantic. The skin is dark grey or brown. It is often smoked as it has dense, oily flesh.
Blue ling. A small variety of ling, it is a long, slender, scaleless fish with a barbel. This is a variety which lives in the Mediterranean which is considered to be slightly inferior to ling.
