Diaphus dumerilii
No common name
NS
G5
Collection Details
Specimens
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Myctophiformes (Lanternfishes)
Myctophidae (Lanternfishes)
Diaphus
Diaphus dumerilii
Description
This species account was compiled from
Composite (multiple sources) (McEachran, J.D. and J.D. Fechhelm. Fishes of the Gulf of Mexico. University of Texas Press, Austin.)
and processed using AI-assisted text extraction.
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Characters
Moderately slender and compressed, with a large mouth, and dorsal and anal fin bases of about equal length. Snout is blunt. Jaws extend 0.7 to 1.0 times eye diameter beyond posterior margin of orbit, and maxilla is not expanded posteriorly. Head is 30% to 33.5% of SL. Posterior margin of operculum tapers to acute angle. Gill rakers number 19 to 27. Dorsal fin originates over pelvic fin base and has 14 or 15 rays. Pectoral fin extends to base of pelvic fin and has 11 or 12 rays. Anal fin originates posterior to dorsal fin base and has 14 or 15 rays. Dn is irregularly shaped and is laterally directed. Vn is small, round to oval, one-half size of body photophore, and located below anterior margin of pupil. PVO1, PVO2, and PO are in straight line. PLO is 1 to 2 times its diameter below lateral line. Five PO are present, with PO4 elevated. VLO is midway between pelvic fin base and lateral line. Five VO are present, with VO1, VO2, and VO3 progressively elevated. SAO form obtuse angle, with SAO1 behind VO5, and SAO3 over and slightly anterior to SAO2 and in contact with lateral line. Pol is in contact with lateral line. AOa number six to eight, with last often slightly elevated. AOp number four to seven, with first occasionally over anal fin base. Four Prc form gentle curve, with Prc4 about 2 times its diameter below lateral line. Luminous scale is present at PLO.
Distribution
Cape Cod to northern Argentina, including the Gulf of Mexico and the Caribbean Sea
Gulf of Mexico
Habitat Associations
Tropical waters of the Atlantic and western Pacific Oceans; daytime depths range from 225 to 750 m, and nighttime depths range from the surface to 155 m; mesopelagic realm
Near the bottom in second year of life
Biology
Maximum known size is 86 mm SL; life span is about two years
Maturity is reached at about 52 mm SL, during the second year of life
High-oceanic and mesopelagic populations are found between 225-750 m during the day (maximum abundance at 450-500 m) and is nyctoepipelagic at surface down to 125 m at night (Ref. 4479). Pseudoceanic and pelagic populations are found in the upper 50 m at night (Ref. 4066). Feeding is acyclic in northwest Africa (Ref. 9198).
IUCN Red List Status: Data Deficient (DD), assessed 2012-07-10. Resilience: High (K=1.83-3.81; tm=0.7; tmax=1.2).
References
Nafpaktitis 1968
Nafpaktitis et al. 1977
Uyeno et al. 1983
Hulley 1984b
Hulley 1986b
Gartner et al. 1987
Gartner 1991
Gartner 1993
Boschung 1992
Hulley, P.A. (1986) Myctophidae. p. 282-321. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin.
Hulley, P.A. (1990) Myctophidae. p. 398-467. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI; Paris; and UNESCO, Paris. Vol. 1.
Uyeno, T., K. Matsuura and E. Fujii (eds.) (1983) Fishes trawled off Suriname and French Guiana. Japan Marine Fishery Resource Research Center, Tokyo, Japan. 519 p.
Bernardes, R.Á. and C.L.D.B. Rossi-Wongtschowski (2000) Length-weight relationship of small pelagic fish species of the southeast and south Brazilian Exclusive Economic Zone. Naga, ICLARM Q. 23(4):30-32.
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