Speaking of rare fish, I tried catching an oarfish while in TV mode using a pro controller, but no matter how fast I was, it would always swim away. Maybe there's a bug with the A button or something?
I know when I googled a couple of months ago there were several complaints that the Pro controller seemed to experience a delay when pressing A for fishing, and this is definitely something I've experienced. When I see a big shadow on the pier, I switch to handheld.