Radioactive substances leaking from the Fukushima nuclear plant. Radiation experts says, there are 2 types of radiation consist iodine-131 and cesium-137. When the both of radiation contamination is flowing down to the ocean. Marine animals will absorb radiation fastest are marine animals that have soft bodies , including seaweed. When people receives a cumulative cesium-137 for long time will increase the risk of cancer, which mainly accumulates in the muscles.