Favonigobius reichei (Bleeker, 1854)
Indo-Pacific tropical sand goby
乳突鰕虎魚
Favonigobius reichei
photo by Randall, J.E.

Family:  Gobiidae (Gobies), subfamily: Gobiinae
Max. size:  8.3 cm TL (male/unsexed)
Environment:  demersal; freshwater; brackish; marine; depth range 0 - 5 m, amphidromous
Distribution:  Indo-West Pacific: East Africa to the Philippines (Ref. 7050), north to Japan (Ref. 559), south to northern Australia (Ref. 33390).
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 8-8; Anal spines: 1-1; Anal soft rays: 7-8. Description: Body depth 6.1 times in standard length (Ref. 90102). Snout gently sloping (Ref. 2798). Dorsal fin with 7 spines and 8 soft rays; anal fin with 1 spine and 7-8 soft rays; pectoral fin with 16-17 rays; second dorsal spine forming elongate, threadlike filament; pelvic fins united medially; presence of pelvic frenum; caudal fin rounded (Ref. 2798, 90102). Scales on lateral line 25-27; ctenoid scales, except cycloid on breast and pectoral fin base; predorsal scales 0-4, scale absent on remainder of head (Ref. 2798, 90102).

Colouration: Body with numerous small spots; sides with 4-5 slightly enlarged groups of black spots, last spot on caudal peduncle often paired, without a vertical bar at caudal base; median fins spotted; paired fins pale (Ref. 2798). Large males with dusky 1st dorsal, anal and pelvic fins (Ref. 2798).

Biology:  Usually in small groups (Ref. 90102). Found over sandy and muddy bottoms, often in weedy areas of intertidal zone; also in mangroves, estuaries, lagoons and rivers (Ref. 4343).
IUCN Red List Status: Least Concern (LC); Date assessed: 02 July 2016 Ref. (130435)
Threat to humans:  harmless
Country info:  Reported from Kei Ling Ha Lo Wai, Wong Chuk Wan, Sha Ha, and Nam Wai (Ref. 125515). A single individual was observed at Sham Chung. May be more common in estuaries and mangroves (Ref. 128523). Juveniles also reported from Ma Shi Chau, Starfish Bay, Three Fathoms Cove, and Lai Chi Chong (Ref. 125536). Also Ref. 94637.


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