Off the coast of Japan, biologists netted a pea-size jellyfish with an unusual circadian clock — a chance finding that ...

A scientist collected a marine invertebrate colony from northern Russia, raised it in an aquarium and discovered a new species, a study said. Screengrab from Getty / iStockphoto video In a laboratory ...

A jellyfish-like hydrozoan with a novel power to rewind its life cycle has been spreading rapidly around the world’s oceans without anyone taking much notice, researchers say. The life history of ...