And whatever is out there it's generally advisable not to swim in rivers/lakes that you can't see the bottom of if you know or suspect either of those live in the area? XD Handy tip about the teeth, I knew how to tell them by snout but not the teeth thing :)
I don't really know for sure, @ryivhnn, but I suppose you should not go for a swim if you suspect any of these to live in that lake/river. I'm glad you learned something new with the teeth; it's a much better way to tell them apart that works independently of the species, so it's very useful. Thanks for stopping by, @ryivhnn :)