Diaphus similis is a species of lanternfish found in the eastern-central Pacific Ocean.Paxton, J.R., R.J. Lavenberg and C. Sommer, 1995. Myctophidae. Linternillas. p. 1315-1321. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para Identification de Especies para lo Fines de la Pesca. Pacifico Centro-Oriental. 3 Vols. FAO, Rome.
Description This species reaches a length of .
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