Sharks have been swimming in Earth’s seas over 450 million years, but some struggling shark species may be ending up on grocery store shelves, in fish markets, and even sold online. Meat from shark species at risk of extinction is still available for sale in the United States, despite lawmaker’s best efforts. Of their sample, 31 percent turned out to be from four endangered or critically endangered species: great hammerhead, scalloped hammerhead, tope, and shortfin mako shark. The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and Endangered Species Act are some of the laws in place to regulate shark meat sales. The legality of selling shark meat in the US mostly depends on where the shark was caught and which species.