could it be that soom of theses creatures could possibly be giant anaconda's? they swim. they undulate through the water. they go ashore. when they swirl in the water they look much like a monster. it's just a thought. i got the idea when i looked at a picture of something in the water and the first thought that came to me was geez that looks like a big assed snake. sorry. but thats what i thought it was. thanks for the sound off.