Our oceans form the earth’s largest life support system. They produce 50% of the earth’s oxygen, and absorb the majority of our carbon. They are a crucial part of the cycle that produces our rain, and provide over a billion people with seafood as a main source of protein. But overfishing, the destruction of coastal habitats, pollution and climate change are threatening their health and the very survival of the vital ecosystem that depends upon them. This deteriorating situation imperils us all.