Diaphus richardsoni is a species of lanternfish found worldwide.Hulley, P.A., 1986. Myctophidae. p. 282-321. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin.
Description This species reaches a length of .
Etymology The fish is named in honor of surgeon-naturalist John Richardson (1787–1865), who was the first collector and writer on lanternfishes from the Indo-Pacific.
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