In a classic case of "poacher turning gamekeeper", the fishermen of Senegal have joined forces to protect one of the ocean's most endangered species - the sea turtle. Three species can be found on the Senegal coast in west Africa. The most populous is the green turtle and they are joined by the loggerhead and leatherhead which can weigh over 600 kilogrammes. They are all beautiful creatures but each is threatened by pollution, poaching and, even now, the fishing net.