Feeding and migratory habits are causing certain species being more exposed to the Japanese Nuclear Waste Leaks than others. Any amount of investigation will help to highlight the most impacted species from the least. A government watchdog will be crucial in advising and protecting the greater public.

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FOR THOSE THAT WANT THE SCIENCE BEHIND IT
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Dilution vs Kuroshio

THEORY: Coast to coast surface to seafloor uniform and ubiquitous
¬¬¬¬¬¬¬ dispersal of radioactive particles minimizes the impact of
¬¬¬¬¬¬¬ the toxic contamination on the environment.

REALITY: Ocean currents are the hydrodynamic 'highways' of the
¬¬¬¬¬¬¬¬ marine environment. The Kuroshio or Japanese current is
¬¬¬¬¬¬¬¬ second perhaps only to the Gulf Stream and proceeds
¬¬¬¬¬¬¬¬ unbroken from the east coast of Japan to the North West
¬¬¬¬¬¬¬¬ Pacific seaboard.

The leaking Japanese plant empties directly into the North Pacific Gyre
where migrating fish stocks often hitch rides right inside the rapid flows
to cross the ocean.
Finding Nemo does a great job to help visualize it.