Tuna's 25,000-mile swim down marine highway By Roger Highfield, Science Editor (Filed: 15/12/2005) The epic voyage of Terry the bluefin tuna - the equivalent to circumnavigating the Earth - has been witnessed by scientists using electronic tags to track fish. A few months ago a great white shark named Nicole completed the first known ocean crossing by a lone shark over a distance of more than 12,500 miles from South Africa to Australia and back in nine months, the fastest known return journey. Now another epic migration, this time of a 200lb bluefin tuna (Thunnus orientalis) nicknamed Terry, has been...