The Fukuryu Maru (Lucky Dragon) was a small Japanese tuna boat, fishing about 90 miles east of Bikini at the time of the BRAVO test. About two hours after the explosion a 'snow' of radioactive ash composed of vaporized coral began to fall on the ship. Within hours, the crew members began to experience burning and nausea. Upon returning to Japan, many were hospitalized and one eventually went into a coma and died. Though the U.S. denied responsibility, it sent the widow a check for 2.5 million yen "as a token of sympathy."

See BRAVO Test.