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 ...

Most deep-sea creatures look like something from the underworld. Their oversized eyes, bizarre bodies, and unusual movements ...