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.
Introduction to Horseshoe Crab. The Horseshoe Crab is a type of arthropod. They are often caught to be used for bait during fishing and for catching eels. They are also used as a natural source of fertilizer. They do look like crustaceans but there are enough differences that prevent them from being categorized there.