Now, I love fishing for smallmouth bass, especially in the clear rivers around Tokyo. there's something about the way they inspect a hopper before sucking it under or smash a streamer on the pause that's just amazing. They're a perfect fly rod fish. Unfortunately, they're an invasive species here and we're supposed to kill them. I don't. Pretty much everyone here releases fish, and the only killing is through the bad handling that is sadly all too frequent here.
The thing I have difficulty with is the evidence of my own observations. Of course I'm not a fishery biologist, but of the rivers I fish here the ones with a population of smallies seem to have a far healthier and more diverse fish populations of other species than those that don't. I can only assume it's because the bass are keeping the carp in check by predating the juveniles. This runs contrary to everything I thought I knew and it should go without saying that I'm not supporting further stocking of non-native species (although for some reason people seem to be OK with trout). It just seems that the terrible, destructive invasive smallmouth bass might not be all bad.