Smooth Hound, Starry Hound, Spur Dog, Lesser Spotted Dog Fish, Huss, Rock Salmon, Shark of all species. They are all edible, and they all have the ammonia taste, unless "hung" for a couple of days, which removes the nasty tang. Skate also have this ammonia taste, and they are usually slit along the edges of their wings, and allowed to "bleed out" the ammonia. They are mostly all cartiliginous [?] fish, having only a central segmented bone, and none of the nasty little rib bones of other fish. Bet you're glad you mentioned it now Kevin :-).....Giok