An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its translucent bell. By night that beat drops ...

Turns out jellyfish and sea anemones – among the ancient creatures with a nervous system instead of a brain – have a very similar sleeping routine to our own. A new study published in Nature ...

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 ...

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 ...

“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, ...

Box jellyfish glide through tropical shallows with an almost delicate grace, yet their venom ranks among the most lethal on ...

Jellyfish, those gelatinous sea creatures often associated with stings and beachside encounters, might seem an unlikely candidate for a nutritious meal. However, these fascinating creatures offer ...

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 ...