Canned salmon, long thought to be just a pantry staple, has unexpectedly become a valuable archive of Alaskan marine ecology.

An Anisakis worm is seen in a filet of salmon. These parasitic worms can be up to 2 centimeters in length and are found in the flesh of raw and undercooked fish. Disclaimer: AAAS and EurekAlert!

Infected fish can't be sold due to the lesions the parasites cause. But the health of the fish is also at risk. In extreme cases, an infestation can cause mass mortality. Currently the most common ...