The sardines and mackerel were found floating on the surface of the sea near the fishing port of Hakodate in Hokkaido
Officials in Japan have admitted they are struggling to determine why hundreds of tonnes of fish have washed ashore in recent days.
Earlier this month, an estimated 1,200 tonnes of sardines and mackerel were found floating on the surface of the sea off the fishing port of Hakodate in Hokkaido, forming a silver blanket stretching for more than a kilometre.
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