第五福竜丸
Parts of the sea bottom may become fallout. After the Castle Bravo test, white dust—contaminated calcium oxide particles originating from pulverized and calcined corals—fell for several hours, causing beta burns and radiation exposure to the inhabitants of the nearby atolls and the crew of the "Daigo Fukuryū Maru" fishing boat. The scientists called the fallout "Bikini snow".