Giant bluefin tuna are in trouble, primarily because the powerful muscles that propel their extensive ocean migrations come with an Achilles’ heel: They’re tasty. Prized by sushi lovers for their savory succulence, all three species of bluefins have seen their population plummet in the past 50 years thanks to worldwide demand. However, there is hope for bluefin. New advances fueled by modern technologies in ocean science may be clarifying how best to manage Atlantic bluefin.