Halichoeres nigrescens (Bloch & Schneider, 1801)
Bubblefin wrasse
Diamond Wrasse,  蠔妹,  Green wrasse,  杜氏海豬魚
Halichoeres nigrescens
photo by Cook, D.C.

Family:  Labridae (Wrasses), subfamily: Corinae
Max. size:  14.6 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 3 - 10 m
Distribution:  Indo-West Pacific: East Africa and Persian Gulf to East Indian region (excluding Papua New Guinea and Solomon Islands); north to China and Taiwan; south to Australia.
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 12-12; Anal spines: 3-3; Anal soft rays: 11-12. This species is distinguished by the following characters: greatest body depth 2.9-3.6 in SL; pectoral-fin rays usually 14. Colour of male green on head and upper two-thirds of body, white on ventral part with inter-connected brown bars on side; lavander bands on head; between 6th and 7th dorsal spines, a diffuse dark spot; upper pectoral fin base with a small black spot; colour of female dark greenish-brown on upper half of body with several small, white spots along middle of the side (Ref. 90102).
Biology:  Inhabit shallow weedy areas of rocky shorelines with little coral growth (Ref. 9710). Found in groups (Ref. 90102).
IUCN Red List Status: Least Concern (LC); Date assessed: 12 April 2008 Ref. (130435)
Threat to humans:  harmless
Country info:  The most abundant wrasse in both coral and rubble areas (Ref. 128523). Recorded from Sharp Island and Hoi Ha Wan. More abundant during summer (Ref. 94637). Also recorded from Cape D'Aguilar, Yan Chau Tong (Ref. 129329); and A Ma Wan in Tung Ping Chau, at depth range 0 to 2.8 meters (Ref. 119714). Juveniles reported from Starfish Bay, Three Fathoms Cove, and Lai Chi Chong (Ref. 125536). The species was observed on 101 to 200 occasions during 400 dive surveys on artificial reefs (Ref. 119494). Sold in live fish markets (Ref. 125552). Also Ref. 9710, 125586.


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.