ammonite , prehistoric fossilized mollusk , an extinct marine animal.

ammonite ancient animal antique archeology background beach boulder breach cephalopod closeup coast cobble coil curled detail dorset evolution extinct find fossil fossilised fossilized geological geology gleaming jurassic look lyme macro marine mollusk monochrome natural nature nautilus object old paleontology period prehistoric prehistory regis rock sea seashell shell snail spiral stone texture turned wet