More beachgoers have been getting an unexpected shock this summer as jellyfish numbers bloom along the Delaware coast, ...

Turritopsis dohrnii can reverse aging through a process called transdifferentiation, giving it a form of biological ...

Scientists blame the problem in part on overfishing, which has sapped stocks of natural jellyfish predators like tuna and turtles, and of small fish that compete with jellyfish to feed on plankton.

Jellyfish sting for two reasons, says researcher Tone Falkenhaug. First, they sting to catch food. "Jellyfish don't have ...

Jellyfish blooms are cyclical, and if conditions are right, an explosion can occur. When warm water meets the right current, ...

Jellyfish, as we know them from the ocean, have a few dozen of them, maybe a little bit over a hundred. But these jellyfish have literally several hundred, maybe close to a thousand.

Researchers have mapped the distribution of a jellyfish subspecies and found that creatures which lack a distinctive "knob" ...

In Ocean City, jellyfish “blooms” typically happen later in the summer. Maybe the abundance of these clear and flowy friends ...

It's likely lion's mane jellyfish in the harbour, according to the Department of Fisheries and Oceans. This type of jellyfish is purplish-red with long, scraggly tentacles that sting.

A rare freshwater jellyfish was captured on camera at Lake Erie. The Pennsylvania Department of Environmental Protection ...