tuna

  • tuna swimming
    fins

    Hydraulic system in fins gives tuna extra speed

    Researchers studying tuna fins may have found what makes the fish such speedy swimmers.
  • tuna sashimi
    fish

    These two types of tuna are carrying more mercury

    Mercury concentrations in Hawaiian-caught bigeye and yellowfin tuna are steadily rising, report researchers.
  • school of tuna
    tuna

    This crude oil ingredient hurts tuna hearts

    A substance in crude oil can damage the hearts of fish exposed to spills. Because it's abundant in air pollution, it may pose a threat to people, too.