Pilot RMP studies of mercury and PCBs in prey fish were conducted from 2006-2010. The addition of prey fish to S&T biota monitoring was piloted in 2023. Topsmelt and staghorn sculpin were collected. Collections were prioritized at near-field locations where other S&T monitoring occurs, particularly for sediment and sport fish so that comparisons can be made among species and matrices. The CEC analytical focus was PFAS and bisphenols.