I grew up in Milwaukee with Ma Baensch Pickled Herring. It's amazing. I always keep a jar in the refrigerator. From what I've read, it's especially a German and East European thing, though you'll find it at Kosher food stores, too.
The first time I visited Amsterdam - about 1981 - I tried one of those whole herrings - expecting the taste of marinated herring. Instead, it kinda felt and tasted like biting into a big piece of lard or animal fat. I've skipped it on later visits.
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Extremism in the defense of Liberty is no vice. . . Restraint in the pursuit of Justice is no virtue.
Senator Barry Goldwater, 1964