Visitors should stay alert to the authorities' instructions and avoid entering the water in areas where these organisms have been spotted.

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 men-of-war are marooning themselves on South Florida’s beaches in high numbers this year, likely due to higher winds. While seeming completely harmless, the bluish balloon-like man-of ...