Diaphus brachycephalus, the short-headed lantern fish, is a species of lanternfish found worldwide.Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text).

Description This species reaches a length of .

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