horseshoe crab on black background close up top view, marine arthropod with domed horseshoe-d shell

ancient animal antique arthropod asia asian background beach biology black blood blue brown carapace close closeup crab crustacean cut design detail food healthy horseshoe isolated life limulus macro marine natural nature nobody object ocean old one out polyphemus sea seafood shape shell single spine tail top tropical underwater view water wild wildlife xiphosurida