03 July 2012, the Ministry of Environment in Japan discovered that fresh water fish are more susceptible to radiation contamination than salt water fish.

From December 2011 to February 2012, they sampled fish from rivers, lakes and eight locations in the Pacific Ocean.  Fresh water fish were much more contaminated than salt water fish.

In a river north of Fukushima Daiichi nuclear plant, goby fish were found with 2,600 becquerels per kilogram of cesium!  The highest readings of cesium in salt water flounder and bass were 260 becquerels per kilogram.

The researchers speculate that the salt in the ocean water absorbs much of the radiation, and then the fish excrete it (the concept is similar to the idea of taking iodide pills after a nuclear accident).

Radiation ends up being concentrated in the bodies of fresh water fish.

ONE YEAR LATER: LEFT BEHIND; FUKUSHIMA PETS STILL WITHOUT HOMES, NEW KITTENS FOUND NEAR NUCLEAR PLANT