Globally, tuna stocks are heavily over fished. But the fishermen in the Maldives - catching their skipjack by pole and line - are giving their skipjack tuna a brighter future.

The Greenpeace ship Esperanza is heading out once more to protect the dwindling tuna stocks of the Pacific Ocean. Over the past few years, some important progress has been made and vast no-take areas have been established but a lot of work...