Tasmanian Numbfish, Narcinops tasmaniensis Richardson 1841


Other Names: Electric Ray, Electric Torpedo, Ground Shark, Little Numbfish, Numbfish

A Tasmanian Numbfish, Narcinops tasmaniensis, at Tranmere, Derwent River, Tasmania, depth 10 m. Source: Will White. License: All rights reserved

Summary:
A medium-sized numbfish common throughout its range. Produces a much smaller shock than Coffin and Torpedo rays.

Cite this page as:
Hicks, T. & Bray, D.J. 2019, Narcinops tasmaniensis in Fishes of Australia, accessed 22 Sep 2019, http://fishesofaustralia.net.au/home/species/3280

Tasmanian Numbfish, Narcinops tasmaniensis Richardson 1841

More Info


Distribution

Off the Solitary Islands, New South Wales, to Partridge Island, Tasmania and west to Eyre, Western Australia. Off Tasmania it occurs to the continental shelf rarely exceeding 100 metres. Occurs mainly on the continental slope further north in it's distribution, occurring at 200-640 metres in depth.

Features

Body depressed; subcircular disc with a broadly rounded apex with concave margins, widest close to point of pectoral fin insertion. Medium sized eye. Skin smooth, frequently creased, lacking denticles or thorns. Tail tapering gradually, about 1.25 times precloacal length. First and second dorsal fin upright, about equal in size.Caudal fin broadly rounded. Pelvic fins narrow and broad.

Size

Length is 9-12 cm at birth. Can reach at least 47 cm total length. Males reach maturity at approximately 20 cm, females approximately 21 cm

Colour

Chocolate brown upper surface, fins paler brown. Ventral surface white, sometimes with a few dark blotches. Juveniles frequently have blotches on dorsal surface of disc and at base of dorsal fin, and a dark median stripe.

Biology

Gives birth to live young, litters range in size from 1 to 8 pups.

Species Citation

Narcine tasmaniensis Richardson 1841 Proceedings of the Zoological Society of London 1841 (9): 22, Port Arthur, Tasmania.

Author

Hicks, T. & Bray, D.J. 2019

Resources

Tasmanian Numbfish, Narcinops tasmaniensis Richardson 1841

References


Carvalho, M.R. de 2008. New species of numbfishes from Australia, with a key to Australian electric rays of the genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae). pp. 241-260 in Last, P.R., White, W.T. & Pogonoski, J.J. (eds). Descriptions of new Australian chondrichthyans. CSIRO Marine and Atmospheric Research Paper No. 022: 1-358

Carvalho, M.R. de & Last, P.R. 2016. 15. Numbfishes. Family Narcinidae. pp. 137-169 in Last, P.R., White, W.T., Carvalho, M.R. de, Séret, B., Stehmann, M.F.W. & Naylor, G.J.P. (eds.) Rays of the World. Clayton South, Victoria : CSIRO Publishing 790 pp.

Fowler, H.W. 1941. Contributions to the biology of the Philippine Archipelago and adjacent regions. The fishes of the groups Elasmobranchii, Holocephali, Isospondyli and Ostariophysi obtained by the United States Bureau of Fisheries Steamer Albatross in 1907 to 1910, chiefly in the Philippine Islands and adjacent seas. Bulletin of the United States National Museum 100(13): 1-879 figs 1-30 

Gomon, M.F. 2008. Families Torpedinidae to Rhinobatidae. pp. 101-107 in Gomon, M.F., Bray, D.J. & Kuiter, R.H. (eds). Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp. 

Gomon, M.F., Glover, C.J.M. & Kuiter, R.H. (eds) 1994. The Fishes of Australia's South Coast. Adelaide : State Printer 992 pp. 810 figs. 

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia. Bathurst : Crawford House Press 437 pp.

Kyne, P.M. & Treloar, M.A. 2015. Narcine tasmaniensis. The IUCN Red List of Threatened Species 2015: e.T161628A68635314. http://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T161628A68635314.en. Downloaded on 30 July 2019.

Last, P.R. & Stevens, J.D. 1994. Sharks and Rays of Australia. Canberra : CSIRO Australia 513 pp. 84 pls. 

Last, P.R. & Stevens, J.D. 2009. Sharks and Rays of Australia. Collingwood : CSIRO Publishing Australia 2, 550 pp.

Richardson, J. 1840. On some new species of fishes from Australia. Proceedings of the Zoological Society of London 8: 25-30 

Richardson, J. 1841. On some new or little known fishes from Australian seas. Proceedings of the Zoological Society of London 9: 21-22

Whitley, G.P. 1940. The Fishes of Australia. Part 1. The sharks, rays, devil-fish, and other primitive fishes of Australia and New Zealand. Sydney : Roy. Zool. Soc. N.S.W. 280 pp. 303 figs.

Yick, J.L., Tracey, S.R. & White, R.W.G. 2011. Niche overlap and trophic resource partitioning of two sympatric batoids co‐inhabiting an estuarine system in southeast Australia. Journal of Applied Ichthyology 27(5): 1272-1277 https://doi.org/10.1111/j.1439-0426.2011.01819.x

Quick Facts


CAAB Code:37028002

Behaviour:To 640 m

Conservation:IUCN Least Concern

Habitat:Sandy, muddy areas

Max Size:47 cm TL

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