Great link Dave!
Apart from the yuck factor, they are harmless if you freeze or cook the fish properly. Raw fish is another story. I have seen them in quite a few sockeye, pink, coho and steelhead.
Never found any in a chum or chinook. Probably just a matter of chance.
So if I am reading the article correctly, krill eat anisakis eggs, salmon eat krill, seals eat salmon, seals then host the parasites until they mate and hatch, and then the seals cupcakes anisakis eggs back into the ocean. Neat, eh?
So COOK OR FREEZE YOUR FISH THOROUGHLY!!
Somebody told me most salmonids have those beasties in their guts.