These are the prettiest freshwater fish, from vibrant brook trout and pumpkinseed sunfish to majestic lake sturgeon. Check out how these species made our list!

A longnose lancetfish washed ashore in a rare appearance in Seaside, Oregon. Seaside Aquarium staff examined the 5-foot-long ...

Trout rely on their lateral line system to detect the movement of predators, prey, and each other. They register all kinds of ...

Filmed by the Schmidt Ocean Institute, the video reveals a deep-sea rattail fish with two parasites clinging to either side ...