Diaphus luetkeni, also known as Luetken's lanternfish, is a species of lanternfish found worldwide.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.
Description This species reaches a length of .
Etymology The fish is named in honor of Danish zoologist Christian Frederik Lütken (1827–1901), recognizing his 1892 classification of twenty four lanternfish species.
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