This jellyfish was large even for a lion’s mane jellyfish, which usually grow to about 1.5 feet long, according to researchers.

As temperatures soar and New Englanders hit the beach, officials are warning swimmers to watch out for massive jellyfish that ...

A giant sea creature that washed up on the Maine shore has fascinated beachgoers, but city officials have a strict warning ...

Beach safety officials warn that dangerous marine life - specifically early-arriving jellyfish - are creating painful problems for swimmers along the Gulf Coast this June.

Genetic analysis reveals bluebottles are actually four distinct species, overturning two centuries of scientific belief.

The City of South Portland is warning beachgoers after a giant jellyfish was spotted at Willard Beach over the weekend.

We grow up believing oxygen is essential to life, and for most animals, that’s true. But some creatures have evolved […] ...

The latest addition is the Marine Organizational Body Size (MOBS) database, an open-access resource that—as its name ...

Two new jellyfish take up residence at the Virginia Aquarium, bringing more understanding and education about these slimy sea ...

Art often imitates life, and sometimes animals do, too. The enormous jellyfish seen in this YouTube video bears a striking ...

The well-known Portuguese man o’ war — Physalia physalis — may look like a jellyfish, but it’s actually a siphonophore, or a colony of animals that live together to create the complete structure, ...

Megan Gilbert told Newsweek: "I'd never seen anything like this before. It was eerie, beautiful, and scary all at the same ...