Human bodies, by comparison, are up to 60% water. A group of jellyfish can go by three different names. Groups of animals typically have their own names: A group of cows is a herd, for example ...

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 ...

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 ...

Despite their name, jellyfish aren’t, of course, fish. In fact they aren’t any one thing. Many of the creatures lumped together as jellyfish are no more closely related than, say, horseflies ...