This fish lives in the austrian Goggauer-lake. His teeth are not the most dangerous thing on him. The saw on his back is a lethal weapon. There is an austrian legend about this fish, a scientist wanted to know more about this creature and so he dived down to that monster in a suit out of 9 glass plates (I don't know how this worked). And the fish severed in a few seconds 8 of the nine plates, the scientist was saved by the bell.