Aulotrachichthys titan Matsunuma, Ujihara & Endo, 2023
Large-head luminous-roughy
Aulotrachichthys titan
photo by Endo, H.

Family:  Trachichthyidae (Slimeheads)
Max. size:  10.81 cm SL (male/unsexed)
Environment:  bathypelagic; marine
Distribution:  Northwest Pacific: from the Kyushu-Palau Ridge, North Pacifc Seamount Chain; probably more widespread.
Diagnosis:  Dorsal spines (total): 5-5; Dorsal soft rays (total): 13-13; Anal spines: 3-3; Anal soft rays: 8-8; Vertebrae: 27-27. This species is distinguished from its congeners by the following set of characters: D V,13; A III,8; ventral scutes 10; scale rows in longitudinal series 72; pored lateral-line scales 31; scale rows between last dorsal fin spine and lateral line 11; a striated area ending near mid-point of caudal peduncle, its length on caudal peduncle 43.2% of caudal peduncle length; posterior interorbital ridges mesially curved posteriorly; posttemporal crest with rounded margin, lacking a large spine; spines of dorsal, anal and pelvic fins have smooth surface, lacking rows of spinules, or distinct ridge or groove (Ref. 130070).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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