Peacock Gudgeon
Tateurndina ocellicauda
Synonyms Peacock goby
Peacock Gudgeon (Tateurndina ocellicauda) is a peaceful freshwater fish that reaches about 7.5 cm (3 in) and swims in open water. It wants 72–79°F (22–26°C) and pH 6.5–7.5, can be kept singly, and needs a tank of at least 41 L (11 gal).

At a glance
| Type | Fish |
|---|---|
| Adult size | 7.5 cm (3 in) |
| Minimum tank | 41 L (11 gal) |
| Group size | Can be kept singly |
| Temperature | 72–79°F (22–26°C) |
| pH | 6.5–7.5 |
| Temperament | Peaceful |
| Lifespan | 4–5 years |
| Eats shrimp | Yes |
Before it goes in
- Peacock Gudgeon needs at least 41 L (11 gal). The smallest size in this library that clears that is the 15 Gallon.
- It eats shrimp. Cherry Shrimp, Crystal Red Shrimp and Bamboo Shrimp are on the menu.
- It is the wrong size to share a tank with Axolotl, Oscar and Clown Loach: it ends up as food.
- It holds at 72–79°F (22–26°C). That shares a window with Betta and Cherry Shrimp, but not with Discus.
- It jumps. An open-top tank needs a lid or a low water line.
- One of them takes up roughly 22% of what a 15 Gallon will comfortably hold, so plan the rest of the stock around it.
What tank size does it need?
At least 41 L (11 gal). The smallest size here that clears it is the 15 Gallon.
Will it eat shrimp?
Yes. Shrimp are food to it, so pick one or the other.
What water does it want?
72–79°F (22–26°C), pH 6.5–7.5.
How long does it live?
4–5 years in a tank that suits it. That is how long you are signing up for.
Good tank mates
- Tank mates from this library that share its temperature window, are peaceful and eat neither it nor its young: Goldfish, Bristlenose Pleco, Celestial Pearl Danio, Molly and Otocinclus.
- Plants that hold up with it: Hygrophila corymbosa 'Siamensis', Water Sprite, Anubias nana 'Petite' and Cryptocoryne wendtii.
Often compared with
| Peacock Gudgeon | Peacock Eel | Butterfly Hillstream Loach | |
|---|---|---|---|
| Adult size | 7.5 cm | 32.5 cm | 7.5 cm |
| Min tank | 41 L | 151 L | 54 L |
| Group | 1+ | 1+ | 6+ |
| Temperature | 72–79°F (22–26°C) | 75–82°F (24–28°C) | 61–75°F (16–24°C) |
| Eats shrimp | Yes | Yes | Shrimplets only |