FWP imposes new restrictions on consuming all fish species in the Clark Fork By: Dennis Bragg and last updated 2020-12-19 13:20:57-05 MISSOULA â Montana Fish, Wildlife and Parks (FWP) is expanding its recommendation to not eat any fish from the Clark Fork River below Missoula, saying there are too many pollutants for safe consumption. FWP and other state agencies issued recommendations seven years ago telling people it was best not to eat northern pike and limit meals of rainbow trout from the Clark Fork River in the areas immediately downstream from the old Smurfit Stone mill site. Now, based on new test results, that advisory is expanding to include all fish species, for a 148-mile stretch from the Bitterroot confluence below Missoula, all the way to the Flathead River at Paradise.