Kiribati — We chased it for 5 days, but as dawn broke over the Pacific this morning we finally confronted the biggest tuna fishing vessel in the world. The Spanish-owned and flagged tuna purse seiner "Albatun Tres" is known as a 'super, super seiner' and can net 3,000 tonnes of tuna in a single fishing trip. This is almost double the entire annual catch of some Pacific island countries.