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In the northern Bering Sea ( north of 58 ° N ) , their main prey species were capelin ( " Mallotus villosus " ) , Alaska pollock ( " Theragra chalcogramma " ) and Pacific herring ( " Clupea pallasii " ) ; they also consumed saffron cod ( " Eleginus gracilis " ) .
 Bering Sea, N, Alaska
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 Bering Sea, N, Alaska