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
Oil Trough, Arkansas Oil Trough, Arkansas Oil Trough is a town in Independence County, Arkansas, United States. The population was 260 at the 2010 census. The town is believed to have acquired its name in the early 19th century from a trough used to render bear fat, which was sold to customers in New Orleans. Oil Trough has been noted for its unusual place name. Odell Pollard, a retired attorney from Searcy and the Arkansas Republican Party chairman from 1966–1970, graduated from Oil Trough High School. Oil Trough is located on the south bank of the White River along Arkansas Highway 14 between