Bathyraja trachura

Alternate names: black skate, roughtail skate

Author: Gilbert, 1892


Reproduction: Oviparous.

Size: to 106 cm TL.

General: Dark-colored (plum, brown, black). Juveniles and immature animals with distinctive dark "v" shape on snout. Snout shaped more acutely and alar thorns prominent in males. Reportedly may have 1–3 nuchals, no mid-back thorns, line of white tail thorns usually prominent, dorsal fins close together (no interdorsal thorn). Claspers white-tipped in males.

Geographic Information

Published depth range: 107 - 2880 m

Ocean range (global): Japan and northern Kuril Islands to western Bering Sea, eastern Bering Sea and Gulf of Alaska south to the Gulf of California.

Habitat description: Benthic, mud, canyon walls, and other hard substrate.

Additional Information

Verified MBARI depth distribution: 573 - 2390 m (March 2016).


Encyclopedia of Life

Tree of Life

World Register of Marine Species

National Center for Biotechnology Information

Ebert, D. (2003). Sharks, rays, and chimeras of California. University of California Press, Berkeley, California. 284 pp.

Bradburn, M.J., A.A. Keller, and B.H. Horness (2011). The 2003 to 2008 U.S. West Coast Bottom Trawl Surveys of Groundfish Resources Off Washington, Oregon, and California: Estimates of Distribution, Abundance, Length, and Age Composition. U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Northwest Fisheries Science Center. 323 pp.

Kuhnz, L.A., J.J. Bizzarro, and D.A. Ebert (2019). In situ observations of deep-living skates in the eastern North Pacific. Deep Sea Research Part I: Oceanographic Research Papers, 103104. doi:10.1016/j.dsr.2019.103104.

Citation: Bathyraja trachura (Gilbert, 1892) Deep-Sea Guide (DSG) at http://dsg/ Monterey Bay Aquarium Research Institute (MBARI). Consulted on 2022-09-28.
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