In pictures: Mozambique's fishing revival

Stocks outside the sanctuaries are also monitored, with the fishermen able to take the catch home.

They target a variety of reef fish, including grouper and goat fish.

Mr Oncobu believes the sanctuaries are also benefiting neighbouring islands.

"WWF are tagging parrot fish to see if they migrate - one was caught far from here. We are feeding people without having to leave our island. This is a really great feeling."