A few generations ago, the Imraguen people used to whistle the dolphins to bring them near the shore and catch all the
mullets that always followed the dolphins. The Imraguen people are the only ones authorized to fish in the Banc d'Arguin area, as long as they use their traditional fishing techniques. The number of fishes caught for each species is limited and strongly reinforced by the Mauritanian authorities. In 2004, the Imraguen people agreed to preserve the shark and ray species in the Banc d'Arguin National Park (which became a UNESCO world heritage site in 1989) and traded their nets for money. The Imraguen people blame the new oil and gas explorations around the Banc d'Arguin area, along with a new road adjacent to the area, as the main factors for the reduction of fish reproduction in the area. At the Arkeiss village, it is possible for tourists to practice "sports fishing" in the Banc d'Arguin and gather up to 5 kilos of fish. ==Language==