Chum salmon get a bad wrap. Most of that is just snobbishness on the part of fishermen who don’t appreciate an abundant, hard-fighting fish. But the chum most people know, the heavily barred, hook-jawed green goblins, don’t start out that way. Chum enter the rivers as startlingly beautiful silver bullets that rival steelhead in every way. Only a few rivers offer reliable fly fishing for chrome chums like this, and the Kanektok River in western Alaska is one of them.