3866 Ctenogobius smaragdus (Valenciennes, 1837) Gobiidae Gobies Gobionellinae Gobiiformes Teleostei Emerald goby Western Atlantic: South Carolina, USA to at least Pernambuco, Brazil; absent in the West Indies except Cuba (Ref. 7251). GCRL 9621 1972 Gobionellus smaragdus 1 m GCRL 15514 1976 Gobionellus smaragdus