In the Mediterranean, the grouper and its environment are strictly protected in the national park, to preserve the species. In 1973, there were about ten groupers in the south of the island. Twenty years later, in 1993, 85 of these fish were seen around Port-Cros and there are now more than 400 of them. But if he average price of a fished grouper, sold by a professional fisherman, is about 150 Euros, the same grouper alive, observed by about 500 divers a year earns the local economy… 7 500 Euros a year ! (at 15 Euros a dive).