From 6,000 miles away, tuna that migrated from the Fukyshima nuclear plant in Japan retained radioactive comtamination according to a story by Alicia Chang, The Associated Press May 29, 2012. While far below the "safe to eat limits, tissue samples tested by Fisher of New York's Stonybrook University from Pacific bluefina tuna off the coast of San Diego contained levels of radioactive substances, cesium-134 and cesium-137 that were higher than from previous catches.
Bluefin tuna are one of the speediest and largest fish, growing to 10 feet and more than 1,000 pounds. They spawn off the Japanese coast and swim at breakneck speed to school of California and the Baja California in Mexico.