Rhina ancylostomus Bloch & Schneider, 1801
Bowmouth guitarfish
Rhina ancylostomus
photo by Awai, M.

Family:  Rhinidae (Wedgefishes)
Max. size:  300 cm TL (male/unsexed); max.weight: 135 kg
Environment:  reef-associated; marine; depth range 3 - 90 m
Distribution:  Indo-West Pacific: Persian Gulf (Ref. 68964), Red Sea and East Africa to Papua New Guinea, north to Japan, south to New South Wales, Australia.
Diagnosis:  An unmistakable guitarfish with a broad, rounded snout, large, high pectoral fins, and heavy ridges of spiky thorns over the eyes and on the back and shoulders; jaws with heavily ridged, crushing teeth in undulating rows (Ref. 5578). Grey or brownish above (Ref. 5578), white below; numerous white spots dorsally on fins, body and tail; black spots on head and shoulders but no eyespots or ocelli (Ref. 3919).
Biology:  Inhabits coastal areas and on coral reefs, close inshore (Ref. 9915). Found on sand and mud bottoms (Ref. 12951). Sometimes found in the water column (Ref. 12951). Feeds mainly on bottom crustaceans and mollusks (Ref. 9915). Ovoviviparous (Ref. 50449). Produces litters of 2-11 pups (Ref. 114953). A row of large spines present above the eye, on the center of the nape, and on the shoulder have a defensive function (can be used for butting). Caught commonly by demersal tangle net, and occasionally trawl and longline fisheries (Ref.58048). Difficult to handle and can damage the catch when caught in trawls (Ref. 9915). Utilized fresh and dried-salted; the pectoral fins are the only part which is eaten (Ref. 9987).
IUCN Red List Status: Critically Endangered (CR); Date assessed: 03 December 2018 (A2bd) Ref. (124695)
Threat to humans:  other
Country info:   

Entered by: Froese, Rainer - 27.01.94
Modified by: Abucay, Luisa - 06.02.21
Checked by: Bailly, Nicolas - 06.02.21

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