chaka kahn we're on. >> what are we doing?hroat trout. >> what's the problem here? >> warming temperatures are actually causing the fish to come off sooner. >> these fish like it cold. >> they like it cold. sooner or later, there's going to be nowhere else to go. yep, there's one, little cutthroat. >> how important is the fish in these streams to montana? >> these streams are actually the life blood to montana. they provide nursery areas for our native fish. >> after capturing numerous fish, the team sets up a triage on the side of the stream. >> we take critical measurements such as length and weight. its length is 92 millimeters. and its weight is just a mere time five grams. >> how do you know it's a cutthroat trout? >> if it last a vibrant red or orange stripe under the brimming. we take a genetic tag, under their body and that allows us to track individual movements. >> they strategically l tag. mofeld says there are solutions. >> stocking fish in the rivers creating habitat, providing streams and lakes for them omove aro