Chinook Salmon Chinooks, also called king salmon, are stocked into the Missouri River system and have been providing thrills for salmon enthusiasts. The inside of the lower jaw of a chinook is blackish in color while in rainbows and browns it is white. They are spotted similar to a rainbow. Chinooks have a long anal fin that contains 15-17 rays. In the late fall when they reach spawning condition they darken in color and gradually deteriorate and die after spawning.
Chinooks thus vary from silvery to black in color.
North Dakota conditions prevent chinooks from reproducing successfully. They are the largest trout found in North Dakota. Lake Trout Lake trout, or mackinaw, have been stocked into the Missouri River system where it is expected they can reproduce successfully. Lake trout have a deeply forked tail and light markings on their silver-gray body. Lake trout prefer deep and cold lakes.