Our Eastern yerp friends are partial to our Freshwater Fish. Where we would fish for sport, be careful with the handling and let them go again, this lot are knocking them on the head for food. Bream, Perch, Roach, Chub etc. All part of their daily diet. A lot of waters are now patrolled 4 times a day by the wardens, but the East Yerps come at night with large nets. Some waters are now empty of large fish. Fights have developed between true anglers and the thieves.
I have tried Perch as part of a survival training lark, it was naff. Mud with bones in….but obviously it would save your life should it need to. I wouldn’t mind trying Pike (Don’t tell him!) because Pike was a delicacy before the gentry turned to Salmon.