[9:30 p.m. Monday ET, 10:30 a.m. Tuesday in Tokyo] High levels of radioactive substances have been found in seawater near the damaged Fukushima Daiichi nuclear power plant, its operator, Tokyo Electric Power Co. said Tuesday. Levels of iodine-131 in the seawater were 126.7 times higher than government-set standards, the electric company said on its website. Its monitors detected caesium-134, which has a half-life of about two years, about 24.8 times higher than the government standards. Cesium-137 was found to be 16.5 times higher than the standard. The electric company detected these levels in seawater 100 meters (328 feet) south of the nuclear power plant Monday afternoon. Radioactive particles disperse in the ocean, and the farther away from the shore a sample is taken, the less concentrated the contamination should be. Because of the huge amount of dilution that happens in the ocean, there's not much chance of deep-water fish being tainted, said Murray McBride, a professor at Cornell University, who studies crop and soil sciences.