I hope there’s garlic in that

Nope. It's raw fish (herring) with raw onion. The pickles are optional (and regional). You eat it by holding the tail, dipping it in the onion and then lifting it above your head and lowering it in your mouth: https://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Haring_03.jpg/1280px-Haring_03.jpg

Do you know what? No.

Just no.

No.