From the transcript

You can find them pretty much anywhere between rivers, lakes, sloughs, wetland complexes, swamps. In Alaska, northern pike are native to areas north of the Alaska Range, including the interior, western and southwestern Alaska, and the North Slope. South of the Alaska Range, through illegal introductions, pike have become established as an invasive species. However, wherever you find pike in Alaska, they're a phenomenal sport fish species and well worth your time to fish for.