Saturday 18 May
Javanese cownose ray (Rhinoptera javanica)
Javanese cownose ray fact file
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Javanese cownose ray description
Cownose rays (Rhinoptera) have earned their common name for their unusual-looking heads, which feature a double-lobed snout and indented forehead (2). As with most rays, the body is flattened, with the pectoral fins broadly expanded and fused with the head and trunk to form a disc (3). This smooth-skinned species is characterised by a kite-shaped body-disc, which is brown on the upper surface and white below (2) (3). The long, thin, whip-like tails of cownose rays (Rhinoptera) are distinctly demarcated from the body and armed with one or more stings.
- Mourine Javanaise.
Javanese cownose ray biology
This species is sometimes found in extremely large groups, with schools of up to 500 rays having been reported (2) (3). Feeding on a diet of clams, oysters and crustaceans (2), the ray uses its large plate-like teeth to crush the shells of its prey (3). Reproduction is ovoviviparous, with live young being ‘born’ after they have hatched inside the female (2).Top
Javanese cownose ray range
Ranging across the Indo-West Pacific, from Durban, South Africa, north possibly to India, Thailand, Indonesia, and southern China. Also in Okinawa, Ryukyu Island and possibly Australia (2).Top
Javanese cownose ray habitatTop
Javanese cownose ray status
Classified as Vulnerable (VU) on the IUCN Red List (1).Top
Javanese cownose ray threats
Cownose rays (Rhinoptera) are fished for food, but not generally taken in large numbers. Of only minor importance to fisheries, they are still caught incidentally in hook-and-line and trawling operations (3). However, the true impact fisheries are having on Javanese cownose ray populations is unknown.Top
Javanese cownose ray conservation
There are currently no conservation measures targeting this species.Top
Find out more
For further information on the conservation of sharks and rays see:Top
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- Living on the lowermost region of a marine habitat, the bottom.
- Method of reproduction whereby the egg shell is weakly formed and young hatch inside the female; they are nourished by their yolk sac and then ‘born’ live.
- Pectoral fins
- In fish, the pair of fins that are found one on each side of the body just behind the gills. They are generally used for balancing and braking.
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