Top 2 comments are like "oh yeah this is over fishing" when the only thing in common with cod are that they're in the ocean.
Either folks aren't RTFA or are being willfully ignorant. Over fishing to the tune 1bn crabs when juvenile populations from 2018 and 2019 looked great? No way.
Do you have any idea of the quantity of radionuclides released from Fukushima and their half lives? Just a couple of kilometres off the coast of Japan their activity is well below (multiple orders of magnitude) the natural background level. The sea is naturally full of radioactive potassium and uranium, amongst a lot of others.