The jellyfish-type creatures travel the ocean via clear "sails." ...

They look like aliens, but these blue jellyfish-like creatures are very much of this world. They are not dangerous to humans, ...

If you've been to Baker Beach in San Francisco this week, you've probably seen droves of blue jellyfish-like creatures ...

Blue, jellyfish-like creatures called velella velella are washing ashore California beaches. Here's what to know.

Animals come in an extraordinary range of body shapes. A starfish looks nothing like an earthworm, a mouse, or a human. Yet even closely related species can appear radically different: corals, ...

Thousands of feet deep in the South Pacific Ocean, a pair of scientists piloted a submersible through the dark waters and scanned the seafloor. Some pale creatures with dozens of tentacles caught ...

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.

From shallow reefs to pitch-black depths, the ocean is alive with sparkling lights. Fish, squid, clams and plankton have found a wide range of ways to glow, shimmer and flash, lighting up the dark ...

Is the sea turtle your spirit animal? The sea turtle has been a powerful symbol for many cultures around the world for centuries. In some cultures, the turtle is seen as a symbol of good luck and ...