- South Africa is home to the world's deadliest sharks and one of them has a dark side - The Ragged Tooth. Every two years, hundreds of Ragged Tooth sharks swim 1500 kilometers along the South African coast, in order to mate. For each, this epic journey is a fight for survival. But for one captive female Ragged Tooth the stakes are even higher.
- Its a shark that can change up to 30 000 teeth in its life. Needle-like teeth which it learns to use while still in its mothers womb to kill and eat its siblings. The ragged tooth shark is the only animal on Earth that is a cannibal before it is even born. Its fearsome appearance, makes the raggie a potential man eater, and in the 1960s the animals were hunted almost to extinction around the coastline of Australia.
But in Ragged-Tooth, a very different picture emerges as we follow this incredible shark on its biannual migration along the South African coast. Here, the raggie population is healthy and stable and the shark is protected. As the animals move north towards their winter breeding grounds, they cross paths with the annual Sardine Run, taking advantage of this bounty of easy prey to fatten up before the mating season begins in earnest.
After the chaos of the baitballs, the raggies travel on into calmer waters, eventually arriving at the limestone caves of the Aliwal Shoal. This area provides the ideal environment for mating and hundreds of sharks gather here every year. Our specialised camera crew ventures into the deep underwater caves at night to film dramatic mating behavior which has never before been observed in the wild. They set up special lighting in the caves, uncovering an eerie world rarely seen by humans. The team members are well qualified to dive for extended periods of time but diving at night in this environment is not for the faint-hearted. The raggies mate in an aggressive manner, leaving the female sharks with savage bite wounds. The male sharks disappear after a few months at the Aliwal Shoal, but we continue to follow the females as they swim 400 kilometres north along the coast, eventually arriving at the shallow tropical reefs of Sodwana Bay. Here, the pregnant females become passive and float in a trance-like state while the pups they are carrying start to eat each other while still in the womb, ensuring only the strongest survive to birth. This extraordinary behaviour ensures the new generation of raggies is well prepared to maintain the ragged-tooth sharks position as one of the most successful predators in the ocean, a predator that plays a crucial role in the ecosystem of the South African coastline.
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