Large-mouth goby (Redigobius macrostoma), first described by Günther, 1861 is a small fish in the family Gobiidae (order Gobiiformes). Adults typically reach 5.00 cm in maximum length. It is diadromous, migrating between freshwater and marine environments during its life cycle. It occurs in Subtropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.
Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 7 - 8; Anal spines: 1; Anal soft rays: 5 - 7. Distinguished by the following characteristics: compressed head and body; grey to pale brown body, mottled and chequered with dark brown dorsally; 8 oblique narrow dark brown to purplish brown bars along side; large black blotch on first dorsal fin; greatly enlarged mouth in mature males; first spine of dorsal fin always longest; second dorsal rays I,7-8; anal rays I,7; pectoral rays 15-18; lateral scales 25-29; TRB 9-12; predorsal scales 12-16, reaching close up behind eyes .: fusiform / normal.
Behavioural data for Large-mouth goby is currently being reviewed.
Marine; freshwater; brackish; benthopelagic; amphidromous . Subtropical
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