My husband used to go catfishing in the Connecticut river decades back. It was so polluted that they never kept what they caught. They'd go at night. So I've never had catfish.

I've always put lemon juice on my fish because I never had tarter sauce. But it dawned on me recently that maybe my summer squash relish and mayo might make a nice tarter sauce, so I tried it and it does!

It seems to me I should know those berries, but no name comes to mind...