There is a stealthy invader in European waters, and the people who live there are blissfully unaware. A freshwater jellyfish ...

An artistic reconstruction of Auroralumina attenboroughii, based on a fossil dated to the Ediacaran Period and recently discovered in the U.K.'s Charnwood Forest. ((Dunn/Kenchington, et al., Nature ...

In the Mediterranean, researchers have studied a jellyfish that bends the rules of aging. The jellyfish is called Turritopsis dohrnii. It is no bigger than a fingernail, yet it can revert from its ...

Jellyfish clone themselves by morphing into a stack of squirming jellyfish pancakes. When grown-up jellyfish love each other very much, they make huge numbers of teeny-tiny potato-shaped larvae. Those ...

Fleets of tiny translucent umbrellas, each about the size of a lentil, waft through the waters of the Mediterranean Sea. These miniature jellyfish, known as Turritopsis dohrnii, wave and grasp with ...