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

TUCSON, Ariz. (13 News) - 13 News has received several calls, messages, and texts about a mysterious object floating in the Tucson sky over the last few days. Turns out it isn’t a space jellyfish, spy ...

Weird sea creature ‘balloons’ are washing up on North Carolina beaches - here’s what they are - Officials are issuing ...

Notorious Portuguese man-of-wars are washing up on North Carolina beaches, prompting warnings along the roughly 150-mile ...

Learn how the air-filled pneumatophore helps the Portuguese Man o’ War float and why it often ends up stranded on beaches.

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

Jellyfish are singular ... the man o’ war is recognized by its balloon-like float, which may be blue, violet, or pink and rises up to six inches above the waterline,” NOAA says.