The Australian box jellyfish (Chironex fleckeri), is so poisonous that if one of its 6-foot-long (1.8-meter-long) tentacles ...

These jellyfish have tentacles that are covered in nematocysts, or tiny darts loaded with poison. If you are injected with ...

The infamous box jellyfish developed its frighteningly powerful venom to instantly stun or kill prey, like fish and shrimp, so their struggle to escape wouldn’t damage its delicate tentacles.

KUANTAN, Jan 13 (Bernama) -- The public has been urged to exercise caution after hundreds of poisonous jellyfish from the species Physalia physalis, commonly known as the "Portuguese man o' war," ...

Jellyfish are known for drifting to and fro at the whim of ocean currents—but not all species are so passive. The millions of golden jellyfish that pack Palau’s Jellyfish Lake spend much of ...

Contact with a box-jellyfish can be fatal. Now, Australian researchers have discovered an antidote that blocks the symptoms of the sting, as long as it's applied to the skin within fifteen minutes.

These are experts in poison, just like infectious disease doctors ... For example, they started receiving calls about stings from jellyfish and stingrays. Jacobitz said that while they may get ...

Jellyfish have survived for over 500 million years, making them more ancient than the dinosaurs. Today these otherworldly creatures can be found around the world, from coastal shallows to the ocean ...