Gobiomorphus coxii (Krefft, 1864)
Cox's gudgeon
Cox's gudgeon,  Cox gudgeon,  Mulgoa gudgeon,  Nepean gudgeon
Gobiomorphus coxii
photo by Aland, G.

Family:  Eleotridae (Bully sleepers)
Max. size:  19 cm TL (male/unsexed)
Environment:  demersal; freshwater, potamodromous
Distribution:  Oceania: restricted to the southeast coast of Australia.
Diagnosis:   
Biology:  Populations appear more abundant in southern rivers, in flowing areas, including rapids (Ref. 2906, 44894). Adults are not found in lower reaches but individuals range upstream into areas of altitudes up to 700 m (Ref. 2906). Rarely found near to the sea (Ref. 44894). Individuals have been observed climbing dam walls using their pectorals, out of direct water flow (Ref. 2906). Adults feed on aquatic insects and mosquitofish. Juveniles generally found closer to the sea. During upstream migration these fish are capable of climbing waterfalls and steep dams. The female lays eggs on rocky surfaces and the male guards and fans the nest until hatching several days later (Ref. 44894).
IUCN Red List Status: Least Concern (LC); Date assessed: 15 February 2019 Ref. (130435)
Threat to humans:  harmless
Country info:  Restricted to the southeast coast of New South Wales from the Richmond system in the north to the Bega River in the south (Ref. 2906). Known between Brisbane, Queensland and Wilson's Promontory, Victoria, ranging inland altitudes of at least 700 meters (Ref. 44894). Also Ref. 11344.


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