the horsetail crab is a detachment of aquatic helicera from the merostomy class. the name is given by the long xiphoid

merostomata crab horseshoe animal beach marine ocean sea shell life limulus nature outdoors polyphemus wildlife arthropoda background sand seashore biology florida invertebrate isolated tail usa closeup coast arthropod environment fossil arachnid unusual cephalothorzx shape unique sandy atlantic eyes crescentic tropical details pattern animals horse cape beautiful coastal texture