I would be avoiding ALL Pacific caught fish, if I were a fish eater, which I'm not. This includes tinned tuna, which is also full of mercury and other heavy metals.
I recently read a very upsetting account of a voyage across the Pacific to the north American coast. Firstly they kept damaging the hull of the boat because of the incomprehensible amount of rubbish in the sea. Secondly, where were all the birds? Gone. There's nothing left for them to eat. They also saw one solitary, dying whale, lying at the surface gasping for breath, with a hideous looking growth on its side. Passing reefs on isolated islands, they watched Japanese factory trawlers sweeping back and forth across the reefs, back and forth, day and night, hauling out everything in their path, leaving nothing behind except dead reef, so that humans can get their cheap fish. Multiply that trawler by a thousand, a hundred thousand.
Quite apart from Fukashima, the Pacific is fucked. We have managed to wreck the vastest ocean on earth.