Hymenocephalus lethonemus Jordan & Gilbert, 1904
Hymenocephalus lethonemus
photo by Yang, N.-S.

Family:  Macrouridae (Grenadiers or rattails)
Max. size:  14 cm TL (male/unsexed)
Environment:  bathydemersal; marine; depth range 220 - 810 m
Distribution:  Western Pacific: southern Japan to the Philippines.
Diagnosis:  This species is distinguished by the following characters: pelvic fin rays 11 (rarely 12); pectoral fin rays 13-15; projecting snout, 20-25% HL; no barbel; moderate orbit diameter, 30-33% HL; infraorbital width 13-15% HL; moderately long preopercular supporter, with obtuse angle at rear margin, 3-5% HL; 20-26 gill rakers; ventral striae reaching to ½ distance from pelvic fin bases to periproct; otolith has moderately high predorsal lobe, with colliculi separated, widely placed across collum, terminating at some distance from anterior and posterior rims of otolith; otolith length to height (OL:OH), 1.05-1.1; total colliculum length to pseudocolliculum length (TCL:PCL), 2.4-2.6 (Ref. 98298).
Biology:  Minimum depth from Ref. 26282.
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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