There are several different types of lung cancer, and the protective fisheffect appeared to be the strongest for a type called adenocarcinoma - about 5% of all cases.
Since cesium binds to the sediment on the ocean floor, the radiation has likely had the biggest effect on bottom-dwelling fish and other animals though the consequences still aren't clear, said Tatsuo Aono, a specialist at Japan's National Institute of Radiological Sciences.