Diaphus gigas is a species of lanternfish found in the northern Pacific Ocean.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 .
Etymology The fish is named in because it is large, at 170 mm TL, the largest species in Gilbert's monograph on the lanternfishes of Japan.
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