The Tanon Strait lies between the Philippine islands of Negros and Cebus. It is a resting ground for whales, dolphins and home to rare marine plants. As biodiversity comes under threat, locals are getting involved in its protection.The Tanon Strait is a migratory route for whale sharks, as well as the home of rare sperm whales and other cetaceans. Fishing has been illegal here since the whole area became a wildlife reserve 18 years ago. Global Ideas pays a visit to the area and examines how the protection of the environment is financed.