Bigeye tuna hooks $10,000 at Gisborne Marlin and Tuna Hunt tournament / Possible world record Great Barrier tuna weighing up to 250kg hooked by beginner angler / Auckland teen reels in 52kg tuna on jetski in Hauraki Gulf / Tuna weighing as much as a grizzly bear sells for $2.1 million in Japan / Tuna weighing as much as a grizzly bear sells for $1.3 million in Japan / For sale: Mozambican tuna boat, never fished / Sharp decline in tuna catch / Quebec fish market reels in customers with 385-kg tuna -- its biggest catch yet / Robo-tuna reveals how foldable fins help the speedy fish manoeuvre / Tuna fishing season using a technique thousands of years old opens in Spain with some of those landed on first day weighing close to 400 kilos