These spiny or slimy ocean creatures display an astonishing diversity of appearances, behaviors and lifestyles—and many are ...

Sky blue, ocean blue, blueberries, my eyes! Despite seeing blue all around us, blue is actually the least common color in ...

The biodiversity of Earth's oceans is disproportionately concentrated in coral reefs—the vibrant undersea ecosystems where ...

A: Nutria (or coypu) are like gophers on steroids.

With their imposing size and austere presence, it's best to keep your distance from gigantic goliath groupers!

There are hundreds of urchin species, and they’re found in every ocean on Earth, from the intertidal zone to more than four ...

Coral reef halos, visible from satellites, can indicate reef health by reflecting predator presence and coral layout.