A MAJOR jellyfish alert has been issued amid the spell of hot weather across the country. Thousands are expected to flock to ...

Humans aren't the only species that like to swim in warm, near-shore waters. Jellyfish are back at the Delaware beaches, ready to ruin a good dip with their stinging tentacles. Sea and bay nettles ...

Last year, the Lewes Beach Patrol treated about 270 jellyfish stings. This year, by July 25, they had treated nearly 900, ...

While jellyfish are a natural presence in U.K. waters, warmer sea temperatures are creating conditions for larger blooms and ...

This freshwater jellyfish is roughly the size of a penny and is a rare sight in the Great Lakes, but it's recently been spotted in Lake Erie.

Jellyfish are causing pain for beachgoers from Maine to Florida. Warming waters and human activity have helped boost jellyfish populations.

I don’t think it’s time to push the panic button yet,” an expert said, after rising reports of swarms and stings for ...

A biologist collected the “cryptic” sea animal in western Russia and was surprised to see what it grew into. Take a look.

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

Cape Cod’s moon jellies were thought to be harmless. Now they’re stinging, possibly without even touching swimmers. This ...

Researchers have sequenced the genome of a unique species of jellyfish with 28 eyes to help us understand the wild evolution of vision.