A Stygiomedusa gigantea, commonly known as the giant phantom jelly, was filmed at 250 meters below the surface.

During a dive off Argentina, scientists documented a rare jellyfish discovered a little over a century ago and seldom seen since, as well as the fish that keep it company.

A recent deep sea exploration off Argentina's coast revealed an incredible video of a giant jellyfish that can grow to be as ...

An artistic reconstruction shows a group of Burgessomedusa phasmiformis swimming in the Cambrian sea. (Illustration by Christian McCall) (CN) — Researchers in Canada have discovered the oldest ...

The Canadian Rocky Mountains offer more than scenic views: The mountains have been hiding fossils of an ancient jellyfish species. Researchers analyzed 182 fossils that were found in the middle ...

The Canadian Rocky Mountains offer more than scenic views: The mountains have been hiding fossils of an ancient jellyfish species. Researchers analyzed 182 fossils that were found in the middle ...

Burgessomedusa unambiguously shows that large, swimming jellyfish with a typical saucer or bell-shaped body had already evolved more than 500 million years ago. Burgessomedusa fossils are ...

Ginger Zee swims in a lake filled to the brim with 20 million jellyfish. — -- Welcome to Palau! The string of over three hundred tiny green islands, 3 degrees north of the equator in the North ...

Locomotion through the seas can be arduous. Water is more viscous than air, so underwater creatures must overcome strong frictional resistance as they swim. To make things more difficult, liquid water ...