The Shark Cave(2013)

In the Indian Ocean, off the coast of Mauritius, two divers set off in search of gray reef sharks. One is native to Mauritius, the other is from South Africa, and both are passionate about sharks and the underwater world. The waters of this region are rich and populated with fish, moray eels, corals and sharks. They used to gather in numbers in hidden pits, but had evaporated since 2004, too fished. The two divers are exploring the funds. And they end up finding them in several places