Leatherback and softshell turtles have shells without the ring of bone around the edge of the carapace or the tough scutes covering it, making it easier for them to squeeze into tight spaces.
Penyu belimbing dan kura-kura bercangkang lunak memiliki cangkang tanpa cincin tulang di sekeliling sudut karapaks atau scute keras melindunginya, membuatnya lebih mudah bagi mereka masuk ke ruang sempit.