The alligator snapping turtle is a large aquatic species having a significantly huge head (compared to other species of turtles). The carapace (upper shell) has three outstanding ridges — 1 alongside the center line and one on possibly side. There's an extra row of scutes (attractive scales) on each side https://alligatorsnappingturtle46790.worldblogged.com/33984028/manual-article-review-is-required-for-this-article