One minute, you’re swimming in the sparkling water off the Queensland coast. The next minute, you’re fighting for your life.

Jellyfish sleep around eight hours a night, take short daytime naps, and compensate for lost rest,all without having a brain.

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 mythical Hydra may have been able to grow one of its many heads back every time it suffered a decapitation, but there are actual creatures capable of regenerating parts of their bodies bitten off ...

A new study analyzed the sleep patterns of jellyfish and sea anemones and found they share some sleep traits with humans. The ...

“I don’t think it’s time to push the panic button yet,” an expert said, after rising reports of swarms and stings for beachgoers in parts of the Eastern Seaboard. By Adeel Hassan No, dear beachgoer, ...

Jellyfish infestations are troubling tourists and scientists alike. A diver attaches a sensor to a large Echizen jellyfish, Oct. 4, 2005 off the coast of Komatsu in Ishikawa prefecture, Japan. Yomiuri ...

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Everyone loves going to the Delaware beaches and having fun in the Atlantic Ocean, but you also have to respect everything that makes its home in the water. While sharks seem to get all the attention, ...

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 ...