Scientific Name
Diaphus knappi  
Diaphus knappi奈氏眼眶魚
by: ©South African Institute of Aquatic Biodiversity (SAIAB)
Author Nafpaktitis, 1978 Depth 122 - 664M
Chinese 奈氏眼眶魚 Poisonous Fish No 
Family_Chinese 燈籠魚科 Economic Fish No 
Family F200 Myctophidae Edible Fish No  Chinese In Mainland China 奈氏眼眶魚 
Max Length 17.3 cm  Aquarium Fish No  Common Name 燈籠魚、七星魚、光魚 
Distribution in World India Ocean to Pacific Ocean   Distribution in Taiwan South 
Habitats Deep Sea、Coastal  Holotype Locality Southwestern coast of Madagascar, 23°36.4'S, 43°31'E, depth 450-460 meters 
Synonyms Diaphus elucens   
Reference A review of lanternfishes( Families: Myctophidae and Neoscopelidae) and their distributions around Taiwan and Tungsha Islands with notes on seventeen new records(Wang and Chen, 2001);Fishes of Japan(Nakabo, 2002)  Nafpaktitis, B. G. 1978 Wang, J. T.-M. etc. 2001 Nakabo T. 2002 
Specimen List ASIZP0057137. ASIZP0058002. ASIZP0058003. ASIZP0061033. ASIZP0061046. ASIZP0061077. ASIZP0061127. ASIZP0062273. NTMP0495.  
Common Name Lanternfish 
Redlist Status NL Not in IUCN Redlist     
Characteristic D. 15; A. 15P. 11; G.R. 6 + 1 + 13 total 20, AO 6 + 5, total 11. Operculum sharply pointed posteriorly. Origin of dorsal fin somewhat in advance of base of ventral fin. Origin of anal fin behind base of dorsal fin. Pectoral fin not reaching origin of anal fin. Base of adipose fin slightly in advance of end of base of anal fin. A roundish, forward-directed Dn, smaller than a body photophores. Vn at anteroventral aspect of eye, superficially connected with Dn by a thin streak of luminous tissue, tapering posteriorly to a point in front of vertical through anterior magin of pupil. Ant developed even in smallest specimen available. PLO somewhat nearer to lateral line than to base of pectoral fin. Distance between VLO and lateral line about 1.5 times as great as that between VLO and base of ventral fin. SAO on a straight, nearly vertical line; space between SAO2 and SAO3 about 1.5 times as great as that between SAO2 and SAO1; SAO3 in advance of origin of anal fin and immediately below lateral line. AOa1 1-1.5 times its diameter anterodorsad to AOa2; penultimeate AOa may be slightly raised, ultimate AOa elevated. Pol somewhat in advance of base of adipose fin and less than its own diameter below lateral line. First AOp over or just behind end of base of anal fin. Prc evenly spaced; Prc4 1.5-2 times its diameter below lateral line. A vertically elongated luminous scale at PLO.
habitats Pseudoceanic species 
Distribution Off eastern and southern Taiwan; From 300-600 m depth. West Pacific, western Indian Ocean.