Look at it go! Whatever the shape the animals are - big or small, round or flat, fins or flippers - they're all at home under water. Take a trip under the sea and learn about turtles, octopuses ...

In the vast and colorful—and sometimes terrifying—world of marine life, few creatures ... sea slug—measuring just a few millimeters in length—resembles a cartoonish sheep with its round ...

For proof of how mysterious and magical the depths of the ocean can be, we've collected 13 stories showcasing completely authentic marine creatures that remind us of the majesty — and weirdness ...

An entire world lives deep under the ocean’s surface, far from human notice and as bustling as any city. Animals such as tubeworms and clams live crowded around plumes of methane that bubble up ...

By helicopter, researchers located and photographed three groups of several animals swimming near sea ice ... indicates the whales have a “year-round circum-Antarctic distribution ...