A Tokyo aquarium known for its tuna breeding program is facing a crisis: the unexplained deaths of its main exhibits.
Seven weeks ago, the Tokyo Sea Life Park had 165 bluefin tuna, kawakawa and striped bonito on display. On Monday it had just 11.
Takashi Sugino, a manager with the center's breeding program, first realized in early December that the fish in a 30-meter doughnut-shaped tank were ailing.