The creature from the black lagoon. I don’t even know it’s from a lake, but when we used to go backpacking, we’d go swimming in lakes, and Bruce my brother would always taunt me that the creature of the Black Lagoon was behind me and scare the poop out of me. I think it looks like a dinosaur or something. I’d want to swim out of the lake really fast. I think it came from a movie but I’d have to look it up.
I had heard of this creature before, and I feel like there may have been a children’s book about it at some point.