I think you mis understood my post Silver, I said that I had killed Catfish in the past, because it was a condition of being allowed to fish that lake, and I would do the same to Zander if the same conditions applied to where I was fishing. The EA has a list of non indigenous species that are illegal to stock, or return to open waters, and I would follow those laws, regardless of species, (I could probably add some others if I made the laws).I totally agree with what you said mate and my response would have been the same. As for predatory species attacking bait fish for fun? I don't think so. They do it to survive, I believe its called the food chain? This bloke obviously hasn't got a clue. Pike mainly scavange feed? OK LOL! Yeah sure they do but they have evolved to become ambush predators.
It annoys me that some people still have this view towards the like of Pike, Zander and Eels. I was Pike fishing the other week when a passers-by said if he caught a Pike he would knock it on the head because they destroy the silverfish population. Not in a well managed / maintained eco system they won't!
As for Zander not being native, does it really matter!? And fair play to you mate for the Carp comment.
I find it strange that we as anglers can say, 'that native furry creature is eating our fish, so we should kill it', but 'that non native scaly creature is eating our fish, but we should leave it alone because we like to catch it', and, 'other non native scaly creatures are out-competing with the indigenous species, but it's ok to get rid of them because they are too small to put much of a bend in the rod'. I don't know about you, but it sounds like the definition of hypocrisy to me.