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. It is currently the only known member of its genus.
The body colouration of Tateurndina 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.
This species prefers soft, slightly acidic water and lots of covers. The use of a dark substrate and floating vegetation will help it feel more secure and show its best colouration. They also need plenty of hiding places, so provide bogwood and areas of dense planting. Paradoxically they will be out and about much more often in this kind of setup. In bare tanks, they will usually huddle around any available bit of cover and move around the tank much less. Although they like very clean water they won’t do well if there is a lot of flow in the. These Gobies are also good jumpers, so ensure there are no gaps around them.
Will usually accept dried food but much prefers small live and frozen stuff, such as Bloodworm, Daphnia, Brine Shrimp etc. The fish will also show much better colouration and come into spawning condition far quicker on this kind of diet.
A little territorial with its own kind but is suitable for many communities of small, peaceful fish. Ideal tankmates are other species from Papua New Guinea, such as Popondetta sp. rainbowfishes; but tetras, rasboras, Corydoras cats and virtually any other small peaceful species are also suitable. Ensure you provide enough tank space if you intend to keep it with other territorial species such as dwarf cichlids.
The Peacock Goby can be kept in small groups without problems. They will squabble amongst themselves, but this is almost always restricted to displaying and flaring and in fact, makes for a more entertaining spectacle than if you just have a couple.
Mature male fish are generally more colourful, particularly when in spawning condition, develop a pronounced nuchal hump, and are a little larger than females. Females also sport a yellow colour on their bellies which males lack. When younger the sexes can be distinguished by looking at the anal fins. Most females have a dark bar running along the length of the outer edge of this fin, whilst most males have no.
This beautiful little fish is not actually a goby, it’s a member of the Eleotridae family, commonly known as sleepers or gudgeon. Members of this family lack the fused pectoral fins of true gobies. This species is one of the smallest and most attractive in the family and makes an ideal resident of the planted community tank.