Istigobius ornatus (Rüppell, 1830)
Ornate goby
Istigobius ornatus
photo by Patzner, R.

Family:  Gobiidae (Gobies), subfamily: Gobiinae
Max. size:  11 cm TL (male/unsexed)
Environment:  reef-associated; brackish; marine; depth range 0 - 5 m
Distribution:  Indo-Pacific: Red Sea south to northern Mozambique (Ref. 4343) and east to Fiji, north to southern Taiwan, south to New Caledonia. Recently recorded from Tonga (Ref. 53797).
Diagnosis:  Dorsal spines (total): 7-7; Dorsal soft rays (total): 10-12; Anal spines: 1-1; Anal soft rays: 9-11; Vertebrae: 26-26. Upper 3-4 pectoral fin rays free. Body color pale gray; operculum with 5 small blue spots interspersed with brownish red spots; 5 vertical rows of white spots on pectoral fins; anterior tip of first dorsal fin bright yellow. 4th spine of 1st dorsal fin longest. Predorsal scales cycloid, trunk ctenoid. Mouth with overhanging snout, lips greatly thickened. Cheeks and operculae without scales. Female pelvic and anal fins not as darkly pigmented as in male. Also with terete body shape, slightly depressed; eyes situated dorso-laterally; reduced swim bladders (Ref. 92840).
Biology:  A common species that inhabits mangroves and silty, rocky areas; occasionally found in rubble reef areas. Only single individuals were observed; many individuals found scattered over a small area (Ref. 420). Found primarily in lower estuaries, usually in mangroves. This is the species of the genus that is found farthest inland. Feeds on small invertebrates (Ref. 12693).
IUCN Red List Status: Least Concern (LC); Date assessed: 02 July 2016 Ref. (123251)
Threat to humans:  harmless
Country info:   
 

Entered by: Capuli, Estelita Emily - 29.05.91
Modified by: Casal, Christine Marie V. - 04.04.18
Checked by: Capuli, Estelita Emily - 14.06.94

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