whitefish

1a :  any of various freshwater salmonid food fishes (especially of genera Coregonus and Prosopium) that resemble the salmon and trout in having an adipose dorsal fin but have a smaller, often toothless mouth and that inhabit cold lakes and streams of the northern hemisphere — see ciscob :  any of various fishes (such as a menhaden or a whiting) resembling the true whitefishesc British :  any of various market fishes with white flesh that is not oily

2 :  the flesh of a whitefish especially as an article of food