Off Tanzania, in one of the world’s richest seas, why is the catch getting smaller?

In Dar-es-Salaam, local fishermen are being squeezed out by illegal boats with explosives which take much of the catch, killing coral reef and putting an eco-system at risk

Fishing boat XTK191, known as Home Boy, returned to Kivukoni fish market in downtown Dar es Salaam at dawn one day last week. The 15 young men on board the old dhow dropped anchor and heaved their catch over the side for others to run it across the beach to where hundreds of traders milled.

Within an hour of landing in eastern Africa's largest fish market, Home Boy's fish, crabs, prawn, lobsters, tuna, squid and shark pups were being sold in impromptu auctions, along with the catches of several dozen other boats.