Recognize that all organisms are composed of cells and that many organisms are unicellular and must carry out all life functions in one cell. 3.1.6.A5 Describe basic structures that plants and animals have that contribute to their ability to make or find food and reproduce.
Crabs are crustaceans and all crustaceans belong to the taxonomic domain of Eukarya, which are characterised by having cells with nuclei. Eukarya covers all organisms in the Kingdom Animalia, as well as the Kingdoms Plantae, Fungi and Protista.
Limulus polyphemus is one of the four and we are fortunate to be able to find it living on the Jersey Shore (including Delaware Bay) since its range is narrow (from Maine to the Gulf of Mexico). While its hard shell and numerous appendages resemble a crab, the horseshoe crab in not a crab at all.The horseshoe crab belongs to the arthropod phylum, along with spiders and scorpions. True crabs have two pairs of antennae, a set of mandibles and five pairs of legs with only one pair with claws.imulus polyphemus is one of the four and we are fortunate to be able to find it living on the Jersey Shore (including Delaware Bay) since its range is narrow (from Maine to the Gulf of Mexico). While its hard shell and numerous appendages resemble a crab, the horseshoe crab in not a crab at all.