I have a good friend who is originally from South Africa. He has been trying to make a favorite recipe for pickled fish which is apparently a classic South African dish. He has managed to make the sauce (which includes curry powder, vinegar, onions and a few other ingredients) but he can't seem to get the fish to work. The fish suggested in the recipe is kabeljou. We live in Northern California and I was wondering if anyone knows an American fish that can be substituted for kabeljou. Thanks.