Imagine a layer of the ocean so teeming with life that, when first discovered, scientists mistook it for the seafloor. This ...

Deep-sea fish adapt to some of the most extreme conditions on Earth. New research analyzing their evolution finds the same ...

A fish was spotted swimming under an eagle ray off the coast of Dunedin, Florida, on April 26. Drone footage from John Yanchoris shows the two animals swimming in unison for several minutes before the ...

It's not every day a terrifying beast from the darkest depths of the ocean just washes up ashore. Yet that's what the ...

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 ...