In pictures: Mozambique's fishing revival

Thick mangrove forests link many of the islands, providing cover for poachers, particularly at night.

Mr Juma leads patrols here.

"At low tide we walk through the mangroves where we sometimes find people fishing illegally.

"We take them to the police station. We confiscate all their materials – their nets, boats – they also have to pay a fine. We must always have our eyes open."