Gymnogobius castaneus
Gymnogobius castaneus (O'Shaughnessy, 1875)
Biringo
Gymnogobius castaneus
photo by Kim, I.-S.


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Family:  Gobiidae (Gobies), subfamily: Gobionellinae
Max. size:  8 cm TL (male/unsexed)
Environment:  demersal; freshwater; brackish; marine, amphidromous
Distribution:  Asia: Japan and in the Kuril islands.
Diagnosis:  Dorsal spines (total): 8-8; Dorsal soft rays (total): 10-10; Anal spines: 1-1; Anal soft rays: 9-9
Biology:  Inhabits freshwater lakes and streams (Ref. 81467). The females show breeding colors. Caught for food in Japan.
IUCN Red List Status: Least Concern (LC); Date assessed: 06 March 2020 Ref. (130435)
Threat to humans:  harmless


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