 However, it was recently determined that due to insufficient study of the original stock most if not all animals in the reintroduction program were actually the similar Colorado River cutthroat trout.Catch and release fishing of the greenback cutthroat is currently permitted in parts of both the South Platte and Arkansas River basins.The Bozeman National Fish Hatchery was a key player in the recovery of the greenback cutthroat trout.