A black-tip sharks is seen swimming during a baited shark dive in Umkomaas near Durban, South Africa, on December 10, 2020. - Aliwal Shoal, a fossilised sand dune that lies about 4km offshore from the coastal town of Umkomaas, is one of the few places in the world where divers can dive without a cage with Oceanic Blacktip sharks and Tiger Sharks, as the apex predators are attracted by a bait drum filled with sardines. Although this activity still attracts many divers and tourists every year, organisers had to change the name from "tiger shark dive" because of the decrease in their numbers - a decrease environmentalists and dive organisers blame mostly on the shark control devices installed from the 1950's. (Photo by Michele Spatari / AFP) (Photo by MICHELE SPATARI/AFP via Getty Images)