Sharks have been an apex predator in the oceans for thousands of years, and over that time the number of species has risen and fallen, but still retains a large number of variations between species. This research focuses on the diversity among shark breeds. A specific focus is upon sharks living in coral reefs, as the high levels of biodiversity in a reef habitat is conducive for large numbers of shark breeds. The goal of this paper is to express the diversity of sharks and what environmental changes lead to the variations seen today in species around the world such as the hammerhead (Sphyrna), sawshark (Pristiophoriformes), thresher shark (Alopiidae) and other species. The image used was created by the Florida Museum of Natural History.