It use to be that some folks slit their bellies open before sending them over the side. That is a violation that can get you a citation.

Dogfish were used in Fish & Chips in England and the belly section was smoked in Germany. They were marketed as Grey fish there and the had been a commercial long line fishery in Puget Sound many years ago. I don't know if this is still practiced.

I was assigned to write an article along with Fred Vander Werff back in the 1980's on fishing and using Dogfish which we did. To me they had very little flavor as fish and chips and I would not recommend them.

The is a book from many years ago called "The Dogfish Cookbook" . I never tried the recipes so cannot judge them.

As a test of smoked Puget Sound fish, I smoked Dogfish,Pacific Cod and rockfish for a party and color coded them with toothpicks. Too my surprise the Smoked Dogfish was the most popular?