About the Brook TroutThe fish weighs in at an average of 52 grams (0.1 pounds) and an average length of 148 mm (5.8 inches).These fish have a dark base color decorated with pale pattern spots, as ...

Big char, brown trout, rainbow trout, brook trout and cutthroat will take a mouse fly. / photo by Ken Baldwin I prefer a mouse that doesn’t get waterlogged, and will consistently stay buoyant.

Scientists have long assumed that fish save energy by swimming in neat diamond formations, but a new study using advanced 3D ...

Bowfin differ in their coloring, too. Northern snakehead fish tend to be tan-colored with dark brown mottling, while bowfin are usually olive-colored with a black spot at the base of their tail.

A photo shows the brown “banded” pattern of a preserved Skelton’s darter fish. Skelton’s darter fish were found under bridges, near waterfalls and in road ditches, the study said.

Growing to about 2.5 inches long, the bright green and brown fish is one of the most colorful you can find in Iowa and it's the only plant or animal that bears 'Iowa' in its name.