General- Sherman, only sexually mature Peamouth Chub exibit the orange stripe that readily distinguishes them from RMW. Even then, when a single set has over 1,000 fish of various species, sizes and maturity, and when speed is imperative for processing these fish, identification mistakes were made. In the early years of this program, Peamouths were occasionally misidentified as pikeminnows as well.
Trust me, I know this as factual as I was in charge of the field component for the first several years.
Many Peamouth Chub are killed as pikeminnows in the annual pikeminnow derby as well.