Gobiodon citrinus, or the Citron goby, is the largest of clown gobies, measuring up to 60 mm. Four light blue bands are located on the head as well as single blue lines along the base of the dorsal and anal fins. A single black spot is located on the operculum. Overall, the fish have a yellow to brownish yellow coloration. They are most likely to be found residing within the branches of A. nobilis.