Black dogfish to the clade formed by the granular dogfish ("C. granulatum") and combtooth dogfish ("C. nigrum"). The black dogfish is a common species, with a wide but discontinuous distribution in the temperate waters of the Atlantic Ocean; its range abuts, but does not extend into, the Arctic Ocean. In the northeast, it occurs from Iceland to Sierra Leone, including the Faroe Islands, southern Norway, and the Rockall Trough and Porcupine Seabight off Ireland. In the northwest, it is found from southern Greenland and Baffin Island to Virginia, being particularly abundant in the Laurentian Channel, and may occur further south to the
Rockall from 26 May 1985 to 4 July 1985 to affirm the UK's claim to the islet. In 1997, the environmentalist organisation Greenpeace occupied the islet for a short time, calling it Waveland, to protest against oil exploration. Greenpeace declared the island to be a "new Global State" (in this case qualifying it as a micronation) and offered citizenship to anyone willing to take their pledge of allegiance. The British Government's response was to state that "anyone is free to go there" and otherwise ignore them. During his one night on Rockall, Greenpeace protester and Guardian journalist John Vidal unscrewed the