Florida Fact: Any body of fresh water, at any time, can contain an gator. When it says "NO SWIMMING" don't swim.
During our last trip to CBR, there is a large lake with sandy beaches. There was a Mother allowing her kids to go in up to their knees when there was a BIG SIGN that said "NO SWIMMING". Gators have "pea" brains, they work on instinct alone, and will "attack" if they think skinny kid legs are bird legs.
Across the lake was wetlands, marsh, etc. I wanted SO BADLY to say something to her, but didn't.

It freaked me out!
