Daigo Fukuryū Maru
Later, the United States expanded the danger zone and it was revealed that in addition to the "Daigo Fukuryū Maru", many other fishing boats were in the expanded zone at the time. It is estimated that about one hundred fishing boats were contaminated to some degree by fallout from the test. Despite denials by Lewis Strauss concerning the extent of the claimed contamination of the fish caught by "Daigo Fukuryu Maru" and other ships, the FDA later imposed rigid restrictions on tuna imports.