If you have the time, go to northern BC. The beautiful Cottonwood River has plenty of them
Kept two of them, released dozens.
The male has the huge dorsal fin.
https://i.imgur.com/YFmGPlt.jpg
Such a beautiful river.
https://i.imgur.com/gYrBkLX.jpg
And a short video.
https://www.youtube.com/watch?v=kmPfOG5zhWg