Dasyatis thetidis Ogilby, 1899
Thorntail stingray
photo by CSIRO

Family:  Dasyatidae (Stingrays), subfamily: Dasyatinae
Max. size:  400 cm TL (male/unsexed); max.weight: 214 kg
Environment:  demersal; depth range 0 - 440 m
Distribution:  Indo-West Pacific: Mozambique, South Africa, Reunion (Ref. 33390), southern Australia, and New Zealand.
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 0-0. A huge, plain, dark stingray with a broadly angular snout and pectoral disc; tail thick-based and tapering to a slender whip, much longer than body, and with no upper caudal finfold but with a long lower one end far in front of tail tip; upper disc and tail of large juveniles and adults roughened by large flat thorns (absent in small individuals); 1 or 2 stings on tail (Ref. 5578). Dark olive green, grey or black dorsally, white ventrally without markings (Ref. 26346).
Biology:  Common inshore (Ref. 6871) but reported to 440 m depth (Ref. 26346). Found in estuaries, lagoons, and around reefs (Ref. 12951). Reported to enter freshwater in Australia (Ref. 12951). Found on soft bottoms (Ref. 5578). Feeds on crabs, mantis shrimps, bivalves, polychaetes and conger eels (Ref. 5578). Ovoviviparous (Ref. 50449).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (120744)
Threat to humans:  traumatogenic
Country info:   

Entered by: Sa-a, Pascualita - 21.04.93
Modified by: Capuli, Estelita Emily - 02.06.17
Checked by: Capuli, Estelita Emily - 30.05.17

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