Anyone unfamiliar with the biology of the venomous Portuguese man-of-war would likely mistake it for a jellyfish. Not only is it not a jellyfish, it's not even an "it," but a "they." The ...

Portuguese man-of-war are marooning themselves on South Florida’s beaches in high numbers this year, likely due to higher ...

Later on, during the spring, many thousands of big barrel jellyfish started turning up on our beaches. "Both were harmless but these Portuguese man o' war are capable of giving extremely painful ...

In some species the oral arms have mouths of their own. Jellyfish like the dreaded Portuguese man-of-war are also related to corals, but they’re part of a different subgroup, the siphonophores ...

Box jellyfish, Portuguese man-of-war, lion’s mane and sea nettle are among highly venomous jellyfish species whose stings require immediate medical attention, per UF Health. If you experience ...