The job of the pivot table is to summarize your source data table based on the criteria you specify in the filter fields (Report Filter, Column Labels, and Row Labels). You can think of it as a very advanced way to arrange and filter your data.
The Limulidae are the only recent family of the order Xiphosura, and contain all four living species of horseshoe crabs: 1  Carcinoscorpius rotundicauda, the mangrove horseshoe crab, found in Southeast Asia. 2  Limulus polyphemus, the Atlantic horseshoe crab, found along the American Atlantic coast and in the Gulf of Mexico.
Their closest relatives are spiders. Visit The New Jersey Sea Grant Consortium at www.njseagrant.org Horseshoe Crab Fact: A Horseshoe crab can have many other animals attached to its shell from barnacles to blue mussels, slipper snails, and worms.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.