Diaphus mascarensis is a species of lanternfish found in the western Indian Ocean.Bekker, V.E. and Y.N. Shcherbachev, 1990. Bathypelagic species of the families Neoscopelidae and Myctophidae from the Indian Ocean, with a description of a new species of Diaphus. J. Ichthyol. 30(7):122-134.
Description This species reaches a length of .
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