Seriously, I took this photo.
They are ALL over the coast in Florida - I've seen them at Bahia Honda State Park (pic above) and at Miami Beach (pic below). It's th e Portuguese Man O' War.
The Portuguese Man O'War (Physalia physalis), also known as the bluebubble, bluebottle or the man-of-war, is commonly thought of as a jellyfish but is actually a siphonophore - a colony of specialized polyps and medusoids.
The sting from the tentacles is dangerous to HUMANS. These stings usually cause excruciating pain, and have even been the cause of several deaths. Detached tentacles and specimens which wash up on shore can sting just as painfully as the intact creature in the water for weeks after their detachment. Teh venom can travel up to the lymph nodes and may cause, depending on the amount of venom, more intense pain. medical atention is usually necessary, especially in extreme cases. And will likely be the most painful experience of your life.
Ok - CRAZINESS.