Tetronarce nobiliana (Bonaparte, 1835)
Electric ray
Tetronarce nobiliana
photo by Scott, S.

 Family:  Torpedinidae (Electric rays)
 Max. size:  180 cm TL (male/unsexed); max.weight: 90 kg
 Environment:  benthopelagic; depth range 2 - 800 m, oceanodromous
 Distribution:  Eastern Atlantic: Scotland (rare in North Sea) to Morocco, whole of Mediterranean, but not Black Sea; Cap Blanc in Mauritania to Gulf of Guinea, São Tomé Island; Walvis Bay, Namibia to Mossel Bay, South Africa (Ref. 5578). Western Atlantic: Nova Scotia, Canada south to Brazil (Ref. 26340).
 Diagnosis:  Large ray with a huge, paddle-shaped caudal fin and with no papillae around spiracles. Shiny black or dark grey above, underside white (Ref. 5578). Broad subcircular disc, short snout anterior to the eyes. Smooth skin, short thick tail (Ref. 6902). Dark chocolate to purplish brown above, without spots, white below, but with edges of disc and pelvic fins of same hue as upper surface, tail with irregular dark margins (Ref. 6902).
 Biology:  Juveniles benthic over soft bottoms or near coral reefs (Ref. 12951) from 10-150 m; adults are semi-pelagic to pelagic, swimming in the water column and have been reported to migrate over long distances (Ref. 2803). Feeds mainly on pelagic and benthic bony fishes and small sharks (Ref. 5578). Ovoviviparous (Ref. 50449). Packs a powerful electric shock of up to 220 volts (Ref. 9710).
 IUCN Red List Status: Data deficient  (Ref. 96402)
 Threat to humans:  other
 Country info:   
 

 Entered by: Froese, Rainer - 01.05.91
 Modified by: Sampang-Reyes, Arlene G. - 30.09.16
 Checked by: Froese, Rainer - 25.07.02

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