You could call it revenge on the birds.

While many marine birds are well known for their skills at diving into the sea to pluck out fishy meals, there is now solid evidence that some Pacific cod have turned the tables on the avian species.

The practice came to light a few years ago when seafood workers in Dutch Harbor noticed that some of the cod they were processing came with extra features -- partially digested birds in the fish stomachs.

Scientists from the Alaska SeaLife Center and University of Alaska have now examined remains of 74 birds collected from cod stomachs in 2011 and have some findings described in a study published online in the journal Marine Ornithology.

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