A rare freshwater jellyfish was captured on camera at Lake Erie. The Pennsylvania Department of Environmental Protection ...

Scientists were astonished to see huge numbers of animals usually seen in traditionally-warmer water, off continental Europe.

A creature resembling a jellyfish was spotted in a pond at Presque Isle State Park. Said creature is called a Craspedacusta ...

Research on alien-like deep-sea jellyfish has hinted at a previously unknown barrier in the North Atlantic Ocean.

Jellyfish sting for two reasons, says researcher Tone Falkenhaug. First, they sting to catch food. "Jellyfish don't have ...