 Before Peña Blanca Lake was drained the fish population consisted of largemouth bass, bluegill, redear sunfish, green sunfish, black crappie, channel catfish, and black bullhead.Stocked rainbow trout could be found in the lake as well.Today the fish species that inhabit the lake are channel catfish, yellow bullhead, largemouth bass, bluegill, black crappie, and redear sunfish.