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.
Horseshoe crabs have blue blood, not because they were born into wealthy families, but because it is copper-based (as opposed to iron-based like most mammals and fish) meaning when it oxidizes, horseshoe crab blood, like the Statue of Liberty, turns blue.