Wondering about the world's weirdest sea creatures? We've compiled this list of the 20 weirdest animals in the ocean to show ...

Far below the ocean’s surface, where sunlight disappears and pressure reaches crushing levels, some of the planet’s strangest ...

Beneath the waves are millions of dangerous sea creatures – and they exist on every continent, from Oceania to Asia and Central America. We’ve ranked the top 20, in order of their deadliness to humans ...

Some of the world’s most fascinating creatures live underwater. And unlike the more mainstream animals under the sea — seahorses, sharks, and even deep sea anglerfish — one cool member of the aquatic ...

An underwater voyage has revealed a network of creatures thriving at the bottom of deep-sea ocean trenches. In these extreme environments, the crushing pressure, scant food and lack of sunlight can ...

Barreleye fish are named for their unique, barrel-shaped eyes. These eyes can rotate, allowing the fish to look both upward and straight ahead. Their eyes also have bright green lenses protected ...

The blue whale is the largest animal known to have ever lived, reaching lengths of nearly 100 feet and weighing more than 300 ...

Sea urchins have a body that is entirely made up of "head"—with a surprisingly complex central nervous system that functions, in essence, like an "all-body brain." This is the conclusion of an ...

It took nearly 25 years for biologists to discover that a swimming and glowing organism in the ocean’s midnight zone was actually a sea slug. By William J. Broad Bruce Robison, a marine biologist, has ...