Jellyfish and sea anemones display human-like sleep, supporting theories about sleep’s role in preserving neurons, even ...

Learn how jellyfish and sea anemones are changing what we know about the evolutionary purpose of sleep.

Meet the giant phantom jellyfish. It's over a metre (3ft) wide and has four ribbony arms that trail behind for up to 10 metres (33ft) ...

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

When you think of stealthy marine predators, a creature commonly called the sea walnut probably doesn't come to mind. However, new research shows the gelatinous blob hunts as effectively as a small, ...

Pink meanies might sound like the name of a high school girl gang from the ’50s, but they are actually a recently discovered type of jellyfish. And lately, experts are urging Gulf Coast beachgoers ...