Jellyfish: Jellyfish and sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa, a major part of the phylum Cnidaria. Jellyfish ...

For Caribbean box jellyfish, learning is literally a no-brainer. In a new experiment, these animals learned to spot and avoid obstacles despite having no central brain, researchers report September 22 ...

The specimens are evidence of how little the squishy, tentacled predators have changed over the history of life on Earth. By Jack Tamisiea Jellyfish have been floating through Earth’s oceans seemingly ...

Jellyfish such as these Northeast Pacific sea nettles in Monterey Bay Aquarium, are brainless, bloodless and mostly aimless. John Lee / Aurora Select On the night of December 10, 1999, the Philippine ...

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 their ...

At the time of this writing, the video (archived) had received more than 124,000 views. While we were unable to determine the creator of the video, it did not show a real jellyfish and was likely ...