This is what might just be the rarest jellyfish in the world, a species only ever seen just once before. It was spotted just ...

Jellyfish are well known for their ability to multiply en masse and influence coastal ecosystems. But what is less known is that they have very diverse and sometimes surprising life cycles. In ...

Swarms of jellyfish were spotted at the foot of a cliff off a popular beauty spot in Wrexham, Devon as temperatures continue ...

The problem with jellyfish is that their stinging cells can remain active even after the animal is dead. Fishermen complain ...

The jellyfish invasion has hit the UK already with swarms of the stinging sea creatures spotted off the coast of Devon with ...

A massive jellyfish with tentacles stretching more than 100 feet washed ashore a Maine beach last weekend — with swimmers and ...

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

And the scorching conditions could last throughout the month.

Kevyn Fowler, a retired photojournalist for local station WMTW, captured video of a lion's mane jellyfish washed ashore in ...

Beach safety officials warn that dangerous marine life - specifically early-arriving jellyfish - are creating painful ...

A 5-foot-wide lion's mane jellyfish spotted on Willard Beach in South Portland last weekend prompted waterside safety ...