Health Risk?: Elevated Radiation Found in Bluefin Tuna Caught Off Calif. Coast

Pacific bluefin tuna migrating last year from coastal Japan to the waters off Southern California contained radioactive cesium isotopes from the Fukushima nuclear disaster, scientists reported Monday. This news sent the Twitterverse careening out of control for a time, but what are the facts?
The amount of radioactivity in the fish was one-tenth the level the U.S. and Japan consider dangerous, and likely posed no public health hazard or risk to people who ate the seafood, the scientists said. But the study showed for the first time that migrating sea life rapidly brought traces of radioactive elements from the damaged Fukushima Daiichi nuclear reactors across vast distances.

[Read more about tuna and radiation:  HuffPo ~ Bluefin Tuna Radiation: Is There A Health Risk? / The Wall Street Journal ~ U.S. Tuna Has Fukushima Taint