Gymnapogon japonicus Regan, 1905
photo by Shao, K.T.

Family:  Apogonidae (Cardinalfishes), subfamily: Pseudamiinae
Max. size:  5 cm TL (male/unsexed)
Environment:  benthopelagic; marine
Distribution:  Western Pacific: Japan to the Philippines.
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 10-10; Anal spines: 2-2; Anal soft rays: 9-9. Body similar to gobioid fishes. No scales on body, but with many well-developed pit organs on head and body. The fan-like caudal fin has many procurrent rays. There is a single downward short spine on the preopercular edge, and many dark-brownish pigments on the caudal peduncle.
Biology:  Sometimes taken by trawl net, and found in the open sea (Ref. 559).
IUCN Red List Status: Least Concern (LC); Date assessed: 14 August 2023 Ref. (130435)
Threat to humans:  harmless


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