Pterothrissus gissu Hilgendorf, 1877
Japanese gissu
Pterothrissus gissu
photo by Yang, N.-S.

Family:  Albulidae (Bonefishes), subfamily: Pterothrissinae
Max. size:  50 cm TL (male/unsexed)
Environment:  benthopelagic; marine; depth range 147 - 1000 m
Distribution:  Northwest Pacific: Japan (Ref. 559), China (Ref. 47439) and Russia (56557).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 54-65; Anal spines: 0-0; Anal soft rays: 10-13; Vertebrae: 105-107. This species is distinguished by the following set of characters (holotype measurements in parentheses): supraneural bones 6-7; dorsal-fin rays 54-65 (mode 58); total vertebrae 105-107 (107); pored lateral-line scales 99-109 (105); pre-dorsal scale rows 13-20 (16); head length 23-31 % (mean 27 %) of SL; pectoral-fin length 10-18 % (15 %) of SL; pre-dorsal-fin length 31-39 % (35 %) of SL; dorsal-fin base length 47-56 % (52 %) of SL; postorbital length 9-12 % (10 %) of SL; upper caudal-fin length 16-32 % (21 %) of SL (Ref. 109573).
Biology:  Found in deep waters.
IUCN Red List Status: Data deficient (DD); Date assessed: 29 March 2011 Ref. (130435)
Threat to humans:  harmless


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