Really it’s hard to explain unless you try it. It is nothing like catching and eating fish. They are sold as little square fillets in sauce. The wine sauce herring taste kind of like a fishy bread and butter pickle with onions, sort of sweet-sour. The cream sauce ones are less sharp, milder. I think it’s usually a sour cream sauce, but I don’t make them, I buy them so who knows. Go pick some up and try it.
I always ate them on a cracker but only because it slowed down the inhaling and made me eat less. Lately they come straight out of the jar on a fork, and if I am feeling patient they may land in a bowl in between the jar and my face.