The alligator snapping turtle is a huge aquatic species using a noticeably massive head (when compared with other species of turtles). The carapace (higher shell) has three outstanding ridges — 1 along the center line and 1 on both side. There is certainly an additional row of scutes (horny scales) https://fernandoaujyk.thezenweb.com/article-under-review-64516341