Here are the U.S. beaches with the most jellyfish stings, plus which species are common, and expert tips on how to avoid and ...

Dangerous Portuguese Man O' War have washed ashore on popular Welsh beaches. Authorities are warning the public to avoid contact with these venomous creatures. Even dead specimens retain their sting.

The Portuguese man-of-war, or Physalia, is a jelly-like creature that uses a special gas-filled balloon to float on the sea ...

An international team of researchers are attempting to find ways to forecast the movements of Portuguese man-of-war.

A dangerous jellyfish has been spotted on the beach, a single sting from which can be fatal. Where was this jellyfish found?

Researchers in Japan have discovered a new species of venomous Portuguese man-of-war jellyfish. A student-led team from Tohoku University identified the previously unknown species of marine hydrozoan, ...

Delaware beaches are experiencing a significant increase in jellyfish, particularly in Lewes, with stings tripling compared to last year. Warmer water temperatures, especially in the Delaware Bay, are ...

At Delaware's Lewes Beach, Beach Patrol Captain Strohm Edwards has seen more jellyfish this year than any other and stings have tripled. Along the Nantucket Sound shoreline, researchers believe ...