The peacock gudgeon or peacock goby (Tateurndina ocellicauda) 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 (3.0 in). It is currently the only known member of its genus.
The Body coloration of T. ocellicauda is blueish and silvery with pink, yellow and black marks along the body and fins. On the sides of the body there are red lateral dotted stripes and a yellow abdomen. On either side of the body, there is a single, large black spot near the start of the caudal fin.
Sexual dimorphism is present in Taterundina ocellicauda. The males will be slightly more colorful, develop a large nuchal hump on their foreheads, and will be somewhat larger than the females (7.5 cm as opposed to 5 cm).The females will have a more brightly colored yellow belly and will have a black bar running along the edges of their anal fins. The females also have a more streamlined body shape as opposed to the more round body shape seen in males.
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