Marine biologists are scratching their heads over an enormous, tentacle-free jellyfish discovered off the coast of Western ...

It's important to recognise jellyfish both in the water and on the shore — they can sometimes resemble plastic bags drifting ...

A new species of venomous Portuguese man-of-war, Physalia mikazuki, has been discovered in northern Japan. Genetic evidence ...

Art often imitates life, and sometimes animals do, too. The enormous jellyfish seen in this YouTube video bears a striking ...

A Japanese teenager discovers a new species of jellyfish in a bay, Orchistoma integrale, extending the habitat of this genus.

Here are the U.S. beaches with the most jellyfish stings, plus which species are common, and expert tips on how to avoid and ...

The Portuguese man-of-war, or Physalia, is a jelly-like creature that uses a special gas-filled balloon to float on the sea ...

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 ...

More than 300 mauve stingers, or palagia noctiluca, were recorded off an Anglesey beach last week, as well as other locations as far south as Pembrokeshire. The delicate, purplish jellyfish, whose ...

The combination of sun, sand and sea sounds like the perfect holiday, but there are some dangers you should watch out for at ...