Fantail Stingray
Copyright by Frank Käck
Fantail stingray - Pastinachus sephen
Cow-tailed stingray (Pastinachus sephen)
Fantail stingray - Pastinachus sephen
Dangerous© iamsiggi
Fishes · Rays · Whiptail stingray

Fantail Stingray

Pastinachus sephen (Forsskål, 1775)
syn. Dasyatis gruveli, Dasyatis sephen, Dasybatus gruveli, Dasybatus sephen, Hypolophus sephen, Pastinachus gruveli +6 more
1.8 m (3 m)250 Kg1-60 mDangerousVenomousNear Threatened
1052

The tail is the identification and it is also the weapon. This ray carries a deep flag of skin along the underside of its tail, two or three times as tall as the tail itself, which fans out when the animal swims and gives it the cowtail name.

The spine sits further back, and it is not a tooth or a claw. It is a modified skin denticle, the same structure as the rough scales that cover a shark, grown into a serrated blade with grooves down each side that carry venom. It points backward, and the strike is upward: a ray that gets stepped on drives the tail up and over, which is why the wound is almost always on a foot, an ankle or a shin.

Which also gives you the answer. Shuffle your feet on sand instead of stepping. A ray that feels you coming leaves, and the ones that sting are the ones that were landed on while buried.

If it happens: get out, and put the limb in water as hot as can be tolerated without scalding, around forty-five degrees, for thirty to ninety minutes. The venom is protein and heat breaks it down, and the relief is dramatic. Then a doctor regardless, because the barb is serrated and fragments break off inside the wound routinely.

The species. Pastinachus sephen (Fabricius 1775) - Arabic name for this fish. ETYFish

How to recognise it
  • tall flag-like fold running under the tail, two to three times the tail's own height
  • thick oval disc, plain gray-brown above, white below
  • no fold on top of the tail, and the tail tip drawn out to a filament
  • usually half buried on sand with only the eyes showing
  • disc up to 1.8 m across

Why it's threatened

Residential & commercial development
Housing & urban areas
Biological resource use
Unintentional effects: (subsistence/small scale) [harvest] · Unintentional effects: (large scale) [harvest]

Cowtail Rays are regularly captured in trawl, gillnet and longline fisheries across the range of this species. In places, fishing pressure is intense and increasing. For example, in the Indian state of Gujarat, the number of trawlers increased from ~6,600 in 2004 to over 11,500 trawlers in 2010 (Zynudheen et al. 2004, CMFRI 2010). Similarly, gillnet fishing (including net length) is increasing in India (Bineesh K.K., unpub. data). Indian west coast annual landings of Cowtail Rays have fluctuated between ~14 and 40 tonnes in recent years (Bineesh K.K. pers. comm. 06/02/2017). In Pakistan waters, about 2,000 trawlers operate in shelf waters, targeting shrimp in shallow waters and fish in deeper shelf waters (M. Khan pers. comm. 06/02/2017). In Iran, there is increasing fishing effort with the number of fishermen going from 70,729 in 1993 to 109,601 in 2002 (Valinassab et al. 2006). In the Saudi Red Sea, the number of traditional vessels operating increased from about 3,100 to 10,000 between 1988 and 2006 (Bruckner et al. 2011).

Cowtail Rays are generally discarded in the Red Sea and the Gulf (due to undesirable meat), in contrast to the normal retention in India. Fishers will often remove the tail before release. Rays without tails seem to survive as these have been recorded on BRUVs in the region (J. Spaet unpub. data). Survivorship from released line catches would be higher than trawl where the species may suffer mortality even if released.

Marine habitats in the Gulf are experiencing high levels of disturbance and quickly deteriorating due to major impacts from development activities (including dredging and reclamation), desalination plants, industrial activities, habitat destruction through the removal of shallow productive areas and major shipping lanes (Sheppard et al. 2010) which is likely to impact this species.

Threat classification from the IUCN Red List.

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Last Update: August 17, 2026