Physiculus nigripinnis is a species of bathydemersal fish found in the north-western Pacific on the Kyushu-Palau Ridge.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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