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

anatomy animal animals arachnid armoured arthropod arthropoda atlantic background beach beautiful biology closeup coast crab crabs cumberland details domed environment florida fossil gills horseshoe invertebrate large life limulidae limulus marine merostomata nature nocturnal ocean outdoors polyphemus sand sandy sea seashore shell spikelike tail texture unusual usa water wildlife