bluefin tuna

A new study finds that tuna harvests, including of some species considered "vulnerable," have increased by an astonishing 1,000% in the last 60 years — a rate some scientists warn is unsustainable.

Sushi chain owner Kiyoshi Kimura purchased the 612-pound Pacific bluefin tuna at auction. Conservationists are alarmed about the fate of the species.

New England fishers say it's been decades since they've hauled in so many tuna, and some in the industry are urging higher quotas. But some environmental groups fear the population is still imperiled.

The long-term agreement would aid fish stocks that have fallen to just 2.6 percent of their historic size. The news comes at a time when Atlantic bluefin populations are also rebounding.

For the sixth year in a row, Kiyoshi Kimura won a massive Pacific bluefin tuna at Tsukiji market's famed New Year auction. Conservationists are worried about the species' dwindling population.

Environmental groups have asked the U.S. to give the prized fish protection under the Endangered Species Act. Some scientists and activists say the chances are slim but the action is long overdue.

A study suggests Atlantic bluefin, prized for its buttery flesh, may breed younger, and in more places, than once thought — and it may be time to rethink fishing quotas. Not so fast, critics argue.

That low price doesn't reflect the true state of Pacific bluefin: Scientists say it's in deep trouble. But fishermen who catch it say they're just trying to make a living — and obeying the law.

Japanese sushi chefs often can't resist bluefin tuna on offer. Some American chefs can't either, even though conservation groups and marine biologists have been badgering them about bluefin for years.