Psenopsis anomala (Temminck & Schlegel, 1844)
Pacific rudderfish
Cá Chim gai,  Japanese butterfish
Psenopsis anomala
photo by CSIRO

Family:  Centrolophidae (Medusafishes)
Max. size:  30 cm TL (male/unsexed)
Environment:  benthopelagic; marine; depth range 0 - 370 m
Distribution:  Western Pacific: Japan and the East China Sea. Reported from Hong Kong (Ref. 12083).
Diagnosis:  Dorsal spines (total): 6-7; Dorsal soft rays (total): 27-33; Anal spines: 3-3; Anal soft rays: 24-28. Body whitish ; in young it is pale brown or blackish brown. Spines of dorsal fin short, not separated from soft-rayed portion (Ref. 41299).
Biology:  Juveniles are associated with jellyfish, and can occur in small groups. Adults become bottom-dwellers (Ref. 128523). Tasty food fish (Ref. 559).
IUCN Red List Status: Least Concern (LC); Date assessed: 29 January 2009 Ref. (130435)
Threat to humans:  harmless
Country info:  Known from Quang Ninh-Cat Ba (Ref. 58534).


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