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The data presented in this week's Science journal found that Fukushima fish are still radioactive from last year's nuclear disaster.
New data shows that fish caught near the Fukushima power plant in Japan are still as contaminated as they were shortly after last year's nuclear disaster.
About 40 percent of fish from the waters close to the Dai-ichi nuclear plant are still unfit for human consumption under Japanese regulations, US marine chemist Ken Buesseler wrote in a study published in this week's Science journal.
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Radioactive levels remain high and show little sign of coming down.
In fact, researchers say fish caught in the area may be inedible for a decade to come, The Guardian reported.
"These fish could have to be banned for a long time," Beusseler told the newspaper. "The most surprising thing for me was that the levels [of radioactivity] in the fish were not going down. There should have been much lower numbers."
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Contamination levels were particularly high among bottom-dwelling fish, as sinking radioactive materials tainted the seafood, Bloomberg reported.
BBC News reported there are likely two sources of lingering contamination.
Polluted groundwater from underneath Fukushima is still leaking into the ocean following last year's earthquake and tsunami that killed nearly 10,000 people.
There's also contamination already found in sediments just offshore, Buesseler says.