New research shatters the myth of the “perfect” plankton-feeding fish revealing an astonishing diversity of forms defying ...

Ever since Charles Darwin, scientists have assumed species facing the same problem often evolve similar traits. But that’s ...

The lake sturgeon, with its sleek shape and rows of bony plates ... The lake sturgeon is the oldest and largest native fish species in North America’s Great Lakes. Lake sturgeons can grow ...

Judges and buyers pay attention to how healthy its skin looks, its size and body shape, and how gracefully the fish moves in the water. But the most important trait of all is the koi's coloring.