This story appears in the October 2018 issue of National Geographic magazine. Moon jellies, which are found in shallow bays around the world, look like small, not entirely friendly ghosts.

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 ...

Scientists have discovered a tiny jellyfish, Turritopsis dohrnii, that has gained attention with its unique ability to reverse aging and restart its life cycle over and over again (1 ...

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 ...

All life depends on the flow of energy, which gets passed from one life-form to another. And there is one creature that embodies more than most just how that happens. This is the Golden Jellyfish.