The alligator snapping turtle is a big aquatic species which has a significantly significant head (as compared to other species of turtles). The carapace (upper shell) has 3 notable ridges — one along the center line and 1 on both aspect. There is certainly an extra row of scutes (horny https://kylerhrlbm.blogofoto.com/57926309/alligator-snapping-turtle-fundamentals-explained