The striking YouTube footage of a Portuguese Man o’ War was captured on a beach at Olivenca, Bahia, in Brazil. The stunning ...

The big, blue jellyfish washing up on Florida beaches this week actually aren't jellyfish at all. Here's what to know about ...

A red flag at Emerald Isle warns beachgoers to expect dangerously strong currents and rough seas if they swim in the ocean.

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 ...