JoyJoy i read about those in either the Miss. or Louisiana board.Its some kind of fungas and they said it gets so thick down there that it will cover a whole area.They had the name of it posted but i can remember what they called it.I believe it is some kind of fresh water jelly fish.And if i remember right you don't want to touch it with bare hands.You might inquire on thier boards becuase it sounds just like what they were talkin about.