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 habitation or economic life of their own shall have no exclusive economic zone or continental shelf". In 1988, Ireland and the United Kingdom signed an EEZ boundary agreement, ignoring the rock per UNCLOS. With effect from 31 March 2014, the UK and Ireland published EEZ limits which include Rockall within the UK's EEZ. In October 2012, the "Irish Independent" published a picture of the Irish Navy ship "LÉ Róisín" sailing past Rockall conducting routine maritime security patrols, and claimed that it was exercising Ireland's sovereign rights over the rock. There have been various disasters on the neighbouring Hasselwood Rock and