Cut the tail off? No, you take it by the tail, hold it over your head and eat it in one go. This is the way.

It's already gutted and separated in two halves, the tail end is what holds the thing together. You grab it by the tail, swallow the fish, bite it off the tail and throw that tail away.

Also, I would very much doubt there is anything on par with Dutch herring. Just saying. I absolutely love that stuff.