Diaphus bertelseni
No common name
NS
GNR
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Myctophiformes (Lanternfishes)
Myctophidae (Lanternfishes)
Diaphus
Diaphus bertelseni
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; moderately large mouth; dorsal and anal fin bases about equal in length; snout blunt; jaws extend 0.6 to 0.9 times eye diameter beyond posterior margin of orbit; head length 33% to 35% and upper jaw length 23.1% to 24.5% of SL; maxilla not expanded posteriorly; gill rakers number 18; dorsal fin originates slightly anterior to pelvic fin base and has 14 or 15 rays; pectoral fin extends past PO4 and has 11 rays; anal fin originates behind base of dorsal fin and has 15 rays; Dn round, directed forward, and one-third to one-half size of nasal rosette; Vn elongate, located between nasal rosette and anteroventral border of orbit, and reaches at most to anterior margin of pupil; PVO3, PVO2, and PVO1 in straight line; PLO closer to base of pectoral fin than to lateral line; five PO present, with PO4 elevated; VLO closer to base of pelvic fin than to lateral line; five VO present, with VO1, VO2, and VO3 progressively elevated; SAO form straight to nearly straight line, with SAO1 posterior to VO5, and SAO3 over origin of anal fin and 3 to 3.5 times its diameter below lateral line; Pol 2 or more times its diameter below lateral line; AOa number six, with first and last elevated; AOp number four, with first over or behind anal fin base; four Prc form ascending arc, with Prc4 2.5 to 3 times its diameter below lateral line; large luminous scale located at PLO
Distribution
New York to southern Brazil, including the Gulf of Mexico and the Caribbean Sea
Gulf of Mexico; rare
Habitat Associations
Tropical to subtropical waters; daytime depths range from 200 to 300 m, and nighttime depths range from 60 to 175 m
Biology
Maximum known size is 80 mm SL
High-oceanic, found between 200-300 m during the day and between 60-175 at night (Ref. 4479, 58302). Mesopelagic (Ref. 58302, 75154). Minimum depth from Ref. 58018.
IUCN Red List Status: Least Concern (LC), assessed 2012-07-10. Resilience: High (Preliminary K or Fecundity.).
References
Nafpaktitis 1966
Nafpaktitis 1968
Nafpaktitis et al. 1977
Hulley 1984b
Hulley 1986b
Gartner et al. 1987
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.
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