All rainbow trout have rows of black spots radiating on their tails, black spots on their sides and back, and have no teeth or tongue. Common rainbows have horizontal pinkish bands and a pinkish gill cover. Feeding Habits Insects, plankton, fish eggs, small fish and crustaceans. Rainbows often feed on the surface. Brown trout are square tailed with few or no spots on the tail and have adipose fins with some spots.
Sides are brownish yellow with both black spots and some red or orange spots.
Spots are often found to have blueish white halos. Feeding Habits Insects large browns feed primarily on fish and crayfish. Browns feed on the surface mostly around dawn and dusk. Brook trout are colored from brown to green. The back is laced with light worm-like marks.