The oceans around southern Asia are also feeling this pressure. These seas feed billions of people around the world. For many fishermen here, their catch is their only source of livelihood. And there is one fish here that they prize above all others. The whale shark. It swims slowly, gently harvesting the plankton. It’s almost 20 metres long, the largest fish in the world. They are also under threat. Like many shark species in Asia, populations have declined by more than half in recent years. They are an easy and valuable catch. But here, there is a respect for the seas and their inhabitants. Whale shark hunting has now been banned across Indonesia’s waters. This whale shark plays a different part in the lives of these fishermen. They feed him, and the relationship seems to bring joy to both parties. And with this new protection has come something truly remarkable. Whale sharks from far away are seeking out these fishermen. And in these safe waters, there is a chance for their numbers to increase. And maybe one day other shark species will be protected too. The people here have made a simple but extraordinary choice — fishing in a way that is sustainable for themselves and the animals. Caring for wildlife is surely our shared responsibility. Across this vast continent, and across the world, it is decisions like these that are key to protecting the planet’s most precious diversity.