Iain Maciver: Tuna proving to have highly adequate GPS – and it’s definitely not a fishy tale

© SYSTEMHOME SALTY HOME: Natal philopatry has seen nostalgic Atlantic bluefin tuna make their way back to where they once roamed.
HOME SALTY HOME: Natal philopatry has seen nostalgic Atlantic bluefin tuna make their way back to where they once roamed.