Box jellyfish are often feared as dangerous animals, with some species capable of causing severe or even fatal stings.

Jellyfish could be much smarter than scientists previously thought, asserts a new study published in the journal Current Biology. Poisonous Caribbean box jellyfish can learn at a far more complex ...

Find out why the notorious box jellyfish deserves its loathsome reputation. The animal's toxins are among the strongest found ...

Most living creatures are bound by the fact of birth, aging and death. Few, however, have evolved to break the typical life cycle. The aptly named immortal jellyfish (Turritopsis dohrnii) is one such ...

Somewhere in the permanent darkness more than two miles beneath the Galápagos Islands, a remotely operated vehicle caught ...

Jellyfish have repeatedly riddled the world of marine biology with its toughest mysteries. The immortal jellyfish might be ...

A sea creature with long tentacles and a painful venom has been spotted on shores from Pawleys Island to Myrtle Beach. The Portuguese man o’ war is a jellyfish-like animal that often looks like a ...

Jellyfish belong to medusozoans, or animals producing medusae, and include today's box jellies, hydroids, stalked jellyfish and true jellyfish. Medusozoans are part of one of the oldest groups of ...

Most people think the great white shark is the ocean predator they should fear the most. However, this type of jellyfish, statistically speaking, is much deadlier. Sharks are probably the animal that ...

Marine animals like jellyfish, corals and sea anemones often live with algae inside their cells in a symbiotic relationship. The animals give the algae nutrients and a place to live; in return, algae ...

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