Illegal fish stocking is one of Montana's biggest fishery threats. Here's why dumping bait fish or "pet" fish can ruin a waterbody forever.

Montana watercraft inspection stations reopen March 7 in Dillon, Ravalli, and Anaconda as Fish, Wildlife & Parks highlights another year of keeping invasive mussels out of state waters. New AIS reports underscore strong prevention statewide—and a growing risk from boats returning from out-of-state waters.