Eerie yet fascinating footage shows the 10-metre-long sea creature gently pulsing and swirling its way through the dark ...

The benefits of sleep may be more universal than we thought. We know it helps clear waste from the brain in humans, and now ...

Studying ancient sea creatures’ snoozing habits could shed light on the origins of sleep.

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 ...

Good question! As climate change continues to affect the ocean, the number of jellyfish is expected to increase in some regions and decrease in others. Warmer waters often favor jellyfish growth, but ...

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 ...

The lights change from purple to red to green to yellow to orange to blue — and so do the jellyfish. The moon jellyfish at Sea Life Orlando Aquarium are translucent, so the animals reflect the light ...

For years, science fiction has promised a future filled with robots that can swim, crawl and fly like animals. In one research lab at Caltech, what once felt like distant imagination is becoming ...

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 ...