They're not native to the uk, like most successful wildlife here, it was introduced a while back and has taken a great liking to the local aquatic inhabitants and discovered they're all great to eat. All angling should be banned with this the only species to be targeted, until it's extinct here. They we can move on to the signal crayfish, grey squirrels, muntjac and those fucking ring necked parakeet cunts which take all the nest holes once used by starlings. Canada geese can fuck off too, and they're good to eat and easy to catch