Psenopsis anomala (Temminck & Schlegel, 1844)
Pacific rudderfish
Melon seed,  瓜核,  瓜核鯧,  Butter fish,  Pacific rudderfish,  刺鯧
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:  Reported from Mirs Bay, Tolo Channel, and Tolo Harbour (Ref. 126271). Also reported from Hoi Ha Wan and Tsim Chau, swimming closely with jellyfish (Ref. 128523). Dominant in catches from depths >180 m in January-March (Ref. 12082). Usually available in the market (Ref. 12075). Commonly consumed in Hong Kong (Ref. 125589). Also Ref. 12083, 125407.


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