Pristiophorus japonicus Günther, 1870
Japanese sawshark
Pristiophorus japonicus
photo by FAO

Family:  Pristiophoridae (Saw sharks)
Max. size:  136 cm TL (female)
Environment:  demersal; depth range 0 - 500 m
Distribution:  Northwest Pacific: Japan, Korea, northern China. Does not occur in the Western Central Pacific (Ref. 31368).
Diagnosis:  Pristiophorus japonicus has a long, narrow, and narrowly tapering rostrum (rostrum length is 26-29% of TL), distance from rostral tip to barbels about equal or slightly greater than distance from barbels to mouth (1:1.1-1.2); distance from rostral barbels to nostrils about equal to distance from nostrils to 1st gill slits. About 15-26 large rostral teeth on each side of the rostrum in front of the barbels, 9-17+ behind them; distance from mouth to nostrils 1.1-1.2 times internarial space. Tooth rows 34-58 in upper jaw. Dorsal and pectoral fins covered with denticles in large specimens. Lateral trunk denticles largely unicuspidate. First dorsal fin origin behind free rear tips of pectorals by eye length or more (Ref. 247). Caudal fin almost straight, with slender upper and lower lobes; pectoral well developed but are not ray-like (Ref. 6871).
Biology:  Lives on continental shelves and upper slopes on or near the bottom. Also found in coastal waters on sand or mud bottoms. Feeds on small bottom organisms using its barbels to poke the bottom with its snout. Ovoviviparous, with 12 young in a litter.
IUCN Red List Status: Data deficient (DD); Date assessed: 01 December 2008 Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Carpenter, Kent E. - 15.06.92
Modified by: Kesner-Reyes, Kathleen - 29.06.05
Checked by: Luna, Susan M. - 25.03.94

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