Jellyfish

The water surrounding upside-down jellyfish often stings to the touch, and now scientists know why.

The barrel jellyfish is named for its massive size and silly-looking head, but it's rare for researchers to get up close and personal with one. Two divers in the U.K. recently had the chance.

Here's a jellyfish video with a twist … actually, make that 40 or 50 twists.

Bizarre fossils in a newly-discovered site include dozens of creatures that are new to science.

Like a rainbow, the anus of a comb jelly is a fleeting thing.

A weird, brilliant blue creature with feathery-like strands is washing ashore onto the beaches of New Jersey.

The glob was an enormous lion's mane jellyfish.

Its designers hope the device will make it much easier to collect delicate animals in the ocean without hurting them.

A remotely operated vehicle named Hercules filmed a rarely seen jellyfish that looks like a cross between an alien and a pinkish makeup bag.

Surprisingly, adult jellyfish survive the winter under the Arctic's thick sea ice.

On a long-gone seashore in what is now Death Valley, ancient, sticky sand retained impressions of the oldest known example of a jellyfish stranding.

If scientists were to draw an enormous family tree for all of Earth's animals, the oldest branch would belong to the jellyfish, a new study finds.

A dime-sized jellyfish that can deliver severely painful stings has been detected in New Jersey waters for the first time.

Like cast members on a distasteful reality show, Portuguese man-of-war "jellyfish" are descending upon the Jersey Shore in increasing numbers.

The Jersey Shore is the place to be this summer (if you're a dead sea creature).

Billions of by-the-wind sailors, also called Velella velella, could wash ashore in coming months because of favorable water temperatures and onshore winds.

If you're bored with all the vertebrates in your wildlife-cam media diet, the Monterey Bay Aquarium in California is now streaming mesmerizing live footage of its jellyfish.