Covering beaches around Mallorca. The barquetes de Sant Pere have filaments with stinging cells, the same type as jellyfish.

Portuguese man o’ war have been spotted on Spanish beaches, forcing the temporary closure of some popular shorelines last ...

The Portuguese Man O'War, often known as a Bluebottle, is a marine hydrozoan typically found in the Atlantic and Indian ...

Like every year, the mistral winds carry small St. Peter's boats similar to jellyfish, a planktonic species belonging to the hydrozoan class that forms floating colonies that are quite typical in ...

While not technically jellyfish, the colonial hydrozoan’s sting can be very painful. The UK’s Wildlife Trusts says the Portuguese man o’ war can be identified as a “large translucent ...

During a visit to my laboratory in the 1980s, a German student, Christian Sommer, and my very first student, Giorgio Bavestrello, collected a hydrozoan thought to be Turritopsis nutricula. This small, ...