Torne river is a border river between Finland and Sweden. It's also popular fishing river. It's well known especially of salmon, but also whitefish. Kukkolankoski rapids (in Swedish: Kukkolaforsen) is about 15km to north from Tornio and Haparanda and there people scooping up whitefish.
Kukkolankoski is also beautiful place to visit. Rapids area is 3500m long and it drops 13,5m. Watch this my video to see more:
Tip! You can buy also smoked whitefish from Kukkolankoski and it's so good.
Regards,
Mika 
