Radioactivity from Fukushima nuclear disaster of Japan has contaminated the Pacific bluefin tuna as discovered from a study of the fish caught off the coast of California. This has been reported in BBC dated the 29th of May 2012.
The examination of the muscle tissues was done by the Stony Brook University, New York on 15 Bluefin tuna fish that had been fished out from the waters of San Diego in Septeber-2011 a few months after the accident in the Fukushima Daiichi power plant subsequent to the Tsunami and the earthquake.
It is reported that all the fish revealed higher levels of radioactive caesium - the isotopes 134 and 137.
For comparison purposes, the scientists examined the Yellowfin tuna as well – these did not show any abnormal levels of contamination.
Scientists have said that these fish are safe for consumption but it reveals the way radioactive pollution can spread from one region to another even though separated by large distances.
Some more interesting recent reports –