In Bahrain, the ancient Dilmun, fishing has always played a fundamental role, as evidenced by the many fish bones unearthed at the archaeological site of Qala'at al Bahrain. Observation of traditional fishing techniques using "haddrah" or "Gargour," still used today, is a source of information. The low coasts of the island have favored fishing "haddrah" big traps 200 to 400 meters long, where the fish came at high tide get stuck when the tide goes out. Species caught living on the funds are mainly groupers, emperors, snappers and rabbitfish, are identical to those identified in the archaeological levels, from the 4th millennium. But these traps are gradually abandoned since the overthrow of the coastal ecosystem (filling, destruction of coral ...) resulted in a lower yield of the fishery. Fishing "Gargour" big pots of 1 to 2.50 meters tall, is increasingly used. The fishing grounds are located about 50 kilometers offshore, the Gargour being deposited in shallow water, they are the same species that are caught. Market, fish sold come only from fishing Gargour. The observation of these fisheries is rich traditional heritage information about endangered it is urgent to remember.