The Alligator Snapping Turtle (Macroclemys temmincki) is the largest freshwater turtle. It has a pointed break and a vermiform (wormlike) tongue, which acts as a lure for fish as the turtle sits on the murky bottoms of ponds and bodies of water.
The fly river turtle or pig-nosed turtle (Carettochelys insculpta) is found in the freshwaters of New Guinea and Australia. These turtles are so unique that they are the only living member of the family Carettochelyidae.
Check out the video from “Life in Cold Blood” with David Attenborough below.
If you want to learn more check out this website: http://www.carettochelys.com