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 often given as 8 July 1810, when a Royal Navy officer named Basil Hall led a small landing party from the frigate to the summit. However, research by James Fisher of the landing (see below), in the log of the Endymion and elsewhere, indicates that the actual date for this first landing was on Sunday 8 September 1811. The landing party left the "Endymion" for the rock by boat. Whilst there, the "Endymion", which was taking depth measurements around Rockall, lost visual contact with the rock as a haze descended. The ship drifted away, leaving the landing party stranded. The