background cream dip Dirt dust dusty edge mollusc mollusk pearly pitted ridge ridges rim rough seashell sharp shell smooth spiral spiraling spiralling surface texture textures turban shell turns twists cave-like holes socket socket-like backgrounds brown colors colours edges folds layers seashells shape shapes shells Sizes textured types variety white alligator-snapping-turtle animal animals appearance artificial carapace color colored colour coloured creature creatures decoration decorative design display displayed exterior external features freshwater-turtle heavy life-like life-sized macrochelys-temminckii ornamental ornamentation outside perspectives powerful-jaws replica reptile sculpted sculpture shaped shell-ridges Singapore snapping-turtle statuary statue surfaces turtle zoo zoological classifications