The snorkeling adventure was in Crystal River, on the west coast. We anchored at a wildlife refuge and after about 15 minutes in the water, sure enough, there were manatees gliding alongside us. Even a calf with mama.
It was sweet, humbling, and cold (as in freezing water) all at the same time.
Sorry for the icky picture quality--I guess you get what you pay for with disposable underwater cameras, at least with the kind sold in dive shops.