The peacock gudgeon or peacock goby is a tropical freshwater species of fish in the family Eleotridae that is endemic to the eastern part of Papua New Guinea. It can be found in schools hovering over the substrate in rivers and ponds.
This species can reach a length of 7.5 cm
Sexing Peacock gobies is very easy. The females stay around 4-5 cm in length while the males can grow up to 7 cm long. The male is also equipped with a noticeably bigger head and sports of type of cephalic hump, while the body of the female is much more streamlined.