Brook trout are a type of fish.
Like all types of fish, each brook trout gives one fish fillet when caught.
Catching brook trout
Brook trout can only be caught with green and blue lures in fishing spot #8 (the rocky area near the fishing boat).
Brook trout can be caught in small circles and therefore are harder to catch.
See Fishing List for more detailed information.
Brook trout in the fishing book
The brook trout is on page 14 of the fishing book:
Likes to relax in a comfortable pond instead of leaping up rivers.