These are some of our favorite stories about the ocean predators, from sinking boats to taking down sperm whales.

A new blue octopus species, Microeledone galapagensis, was recently discovered near Darwin Island in northern Galápagos.

National Geographic announced Tuesday that it is officially recognizing the Southern Ocean as the Earth's fifth ocean. The announcement was made to coincide with World Oceans Day. The Southern Ocean ...

This secretive native of both sides of the Caribbean—from Belize to the British Virgin Islands—hides out on ledges and in caves of reefs up to 140 feet below the surface of the sea. Although not being ...