Do they ever key in on shrimp/krill? I’ve a thing for tying shrimp patterns.Like I said, that's just my own thoughts. Absolutely zero proof that it would actually make a difference lol. That fishery is so crazy. There are times I think the fish would eat any fly in existence, and other times when they are so damn selective it had better be exactly what they want. Ultimately I reckon a good variety of size, color, profile etc on hand is about the best anyone can do.