Lake whitefish are a type of fish.
Like all types of fish, each lake whitefish gives one fish fillet when caught.
Catching lake whitefish
Lake whitefish can only be caught with green and blue lures in fishing spot #10 (the rocky area south of the lake).
Lake whitefish can be caught in small circles and therefore are harder to catch.
See Fishing List for more detailed information.
Lake whitefish in the fishing book
The lake whitefish is on page 42 of the fishing book:
You will find this fish hanging out with its pals in deep cold waters.
(Note: the lake whitefish is displayed in spot #9 in the fishing book but cannot be caught in this spot.)