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
The Trough The Trough The Trough is a 6-mile long wooded gorge carved by the South Branch Potomac River (SBPR) and situated in the Allegheny Mountains of Hampshire and Hardy Counties, West Virginia, USA. The area was the site of a 1756 skirmish of the French and Indian War, known as the "Battle of the Trough". The steep slopes of the Trough are forested primarily with oaks, hickories, Virginia pine, large quantities of paw paw, with several rock outcrops visible on both sides. The two wooded ridges that define The Trough make it inaccessible from either side. Entry into The Trough is