Some strange goings on here;

 https://www.worcesternews.co.uk/news/19058653.anger-barbaric-electric-fish-nets-used-diglis-basin/

Could say the same about our non native  barbel.  Not heard of a Zander from the Wye yet but suspect it's only a matter of time

Couple of Prawny thing which might be worth a go latter on.  Pity they never work as well as the real thing.