Tetronarce is a genus of ray fish, commonly known as electric rays. They are slow-moving bottom-dwellers capable of generating electricity as a defense and feeding mechanism. Tetronarce species tend to attain a much larger size of up to 180 cm TL than Torpedo electric rays species, which usually range from 25 to 80 cm TL.
Species There are nine recognized species in this genus:Carvalho, M.R. de. (2015): Torpedinidae. In : Heemstra, P.C., Heemstra, E. & Ebert, D.A. (Eds.), Coastal Fishes of the Western Indian Ocean. Vol. 1. South African Institute for Aquatic Biodiversity, Grahamstown, South Africa. In press. Image Name Common name Distribution Tetronarce californica Ayres, 1855 Pacific electric ray northeastern Pacific Ocean from Baja California to British Columbia. Tetronarce cowleyi Ebert, D. L. Haas & M. R. de Carvalho, 2015 Ebert, D.A., Haas, D.L. & de Carvalho, M.R. (2015): Tetronarce cowleyi, sp. nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae). Zootaxa, 3936 (2): 237–250.Cowley's torpedo ray around southern Africa, from Walvis Bay, Namibia to Algoa Bay, Eastern Cape, South Africa Tetronarce fairchildi F. W. Hutton, 1872 New Zealand torpedo New Zealand Tetronarce formosa D. L. Haas & Ebert, 2006 Taiwan torpedo Northwest Pacific: Taiwan. Tetronarce macneilli Whitley, 1932 Shorttail torpedo southern Australia from Port Hedland to the Swain Reefs Tetronarce nobiliana Bonaparte, 1835 Atlantic torpedo Atlantic Ocean, from Nova Scotia to Brazil in the west and from Scotland to West Africa and off southern Africa in the east Tetronarce puelcha Lahille, 1926 Argentine torpedo Argentina, Brazil, and Uruguay. Tetronarce tokionis S. Tanaka (I), 1908 Trapezoid torpedo Japan and Taiwan. Tetronarce tremens F. de Buen, 1959 Chilean torpedo Chile, Colombia, Costa Rica, Ecuador, and Peru.
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