Nothing ruins a nice seaside swim than someone shouting about something swimming in the crystal clear waters, right next to ...

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

Portuguese man o' war, often mistaken for jellyfish, have been sighted on Florida beaches. While rarely fatal to humans, the sting can be intense and should be treated with hot compresses, not ...

The tentacles of a Portuguese man-of-war can grow to be 165 feet long. Roberto La Rosa/Shutterstock. It may not be a jellyfish, but the man-of-war does have one trait we commonly associate with ...

After a Portuguese man-of-war jellyfish washed up on the Wildwood Crest beach over the weekend, Michele Carrafiello and Kevin Kelly, medics of the Wildwood Crest Beach Patrol, said the best method ...

A Portuguese man o’ war jellyfish, one of the most dangerous jellyfish in the world, suddenly washed up on the beach in Menorca, Mallorca’s neighbouring island. The beach was promptly closed ...

It is estimated that there are between 700,000 and one million creatures living in the ocean. To date, approximately 242,500 ...

Unlike jellyfish, a Portuguese man-of-war is made up of several organisms. Like jellyfish, they pack painful stings and venom that paralyzes small fish and crustaceans.

The Portuguese Man o’ War is distinctive because of its balloon-like float, which rises out of the water and is used like a sail against the wind to move the creature.

The Portuguese man-of-war is not a jellyfish, but is closely related. The name comes from its resemblance to an 18th-century Portuguese warship at full sail, according to the NOAA website.