Somniosus longus (Tanaka, 1912)
Frog shark
No Picture Available

Family:  Somniosidae (Sleeper sharks)
Max. size:  109.8 cm TL (male/unsexed); 130.1 cm TL (female)
Environment:  bathydemersal; marine; depth range 250 - 1160 m
Distribution:  Western Pacific: Japan and New Zealand.
Diagnosis:  Vertebrae: 77-79. Somniosus longus is distinguished from S. rostratus in having a relatively longer second dorsal fin where overall length is almost equal to first dorsal fin 91-100% (vs. 76-88%); slightly larger eye with horizontal diameter more than 37% (mean 46%) of length from snout tip to eye (vs. <37, mean 33%); higher number of tooth rows in upper jaw 56-57 (vs.53); and slightly higher spiral valve counts 26-27 (vs. 23 ) (Ref. 50224).
Biology:  Caught by crab pot and bottom longline (Ref. 50224).
IUCN Red List Status: Data deficient (DD); Date assessed: 02 July 2017 Ref. (124695)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 08.03.11
Modified by: Capuli, Estelita Emily - 11.08.21

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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