I've lived in Florida my whole life and I've never heard of this...but apparently it's pretty serious. "Sea lice" have been found off the Gulf coast of Florida, causing skin rashes and other symptoms.
What in the world are sea lice, you ask? Well, I didn't know either, so I Googled it! Sea lice aren't lice at all. They're the tiny eggs of jelly fish and sea anemones, and they contain the same toxins that make your skin itch or burn when you're stung by a jelly fish or anemone. But they're barely visible to the naked eye, and since you can't see them, you could swim right into them and not know it until your skin is itchy, red, and inflamed. FUN!
Officials say the peak season for sea lice is March to August