Freshly caught tuna is processed by drying it in the sun after cooking and smoking.

These custom-built vessels have been designed to catch only tuna - in huge quantities.

The factories, for example, work with the same nylon cord used by commercial fisherman to catch 60-pound tuna.

Nets are often used by fishing boats there to catch tuna.

Sport fishermen like to catch tuna using rods and hooks.

Dolphins often die when they become entangled in nets used to catch tuna.

They use it to catch thousand-pound tuna in the Pacific.

In addition 500 more boats set about 10,000 miles of net a day to catch tuna and billfish.

Fishermen on the top of the raft used handlines to catch tuna.

The sight of Peter not catching tuna is particularly rewarding.