If this were true, there would be a marine zone of death near Fukushima that dissipates with distance. For the Bering Sea to be so impacted, the Pacific near Japan would be entirely devoid of life, and it isn’t.
> the Pacific near Japan would be entirely devoid of life.
I can't see why. Sealife does not work like that.
Ecosystems "collapse" only to rebuild in a different direction. All those cods vanished are now lobsters. To remove all the life in the ocean we would need a really extreme event. Not even an atomic bomb could do it in Bikini Atoll
And we need to stop lying to ourselves pretending that we have enough data about the Oceans. Some very serious troubles in the ecosystems can be spotted only by an expert, after a lot of hard work, and their effects will happen later and in a different continent.
What I can see is a list, that is getting longer and longer each year, about massive die-offs in the Pacific. Sometimes is El Niño, other is "the bird flu" or the "yellow flubmarine". Who knows? The fact is that --nobody knows-- exactly why this famished dolphins showing the ribs decided to strand here to die, and most of the corpses will be too decomposed after floating for three weeks before arriving to the coast.