In the North of Scotland we dont get
bream, tench, carp, crucean, roach, bleak,
we do get
Salmon, Pike, Artic Char, Brown Trout, Rainbow Trout, Sea Trout which are all common freshwater fish and are edible although I wouldnt eat Pike.
Catch and release is up to the fisherman and is really just common sense.
Sea Fishing from the shore, common fish are Cod, Mackeral, Dogfish, Pollack, Coalfish, Conger Eel, Ling, Dogfish and all sorts of flatfish and flounders.
You can eat them all but I would give the Eels a miss.
We are a bit spoilt for choice and generally turn our noses up at farmed fish and would have to be really hungry to eat bottom feeders like catfish, carp etc