thing is.. crawdads are brown, so what happens to brown when its at a deep depth? would it turn a different color or stay brown? i'd still use a brown color pattern to imitate crawdads. but then again.. maybe if im using bait for trout and decided to throw a boiled red crawdad into a deep spring hole, maybe they'll smell it better and will think its a crawdad b/c red = brown in deep depths as the study said.. eh, i doubt ill do it, i dont think im going back to bait fishing for trout, except maybe... maybe, tipping some of my streamers with a spike (maggot) on those super slow days.