Peacock Gudgeon Care Guide: The Colourful Micro Predator
Few nano fish match the visual intensity of the peacock gudgeon. With vivid blue flanks, red-orange striping and a distinctive ocellus (eyespot) on the caudal fin, Tateurndina ocellicauda looks like it belongs on a coral reef rather than in a freshwater planted tank. This peacock gudgeon care guide covers tank requirements, diet, behaviour and breeding for hobbyists in Singapore. At Gensou Aquascaping, 5 Everton Park, we have kept and bred these fish for years and consider them one of the best nano species available.
Origin and Natural Habitat
Tateurndina ocellicauda is native to lowland streams and ponds in Papua New Guinea, where it inhabits shallow, slow-moving water with abundant plant cover and leaf litter. Despite being commonly called a gudgeon, it belongs to the family Eleotridae (sleeper gobies) rather than true gobies. It reaches a maximum size of about 7–8 cm, with females slightly smaller than males. Its natural habitat is warm, soft and slightly acidic — conditions that Singapore’s water and climate replicate closely.
Tank Size and Setup
A 40-litre tank is the practical minimum for a group of four to six peacock gudgeons. A 60-litre setup gives more room for territories and is strongly recommended if you want to observe natural behaviour. These fish occupy the lower third of the water column, so floor space matters more than height. Use fine sand or smooth gravel as substrate — peacock gudgeons rest on the bottom frequently and coarse material can irritate their undersides. Include plenty of hiding spots: small caves, PVC tubes, coconut shells, or overhanging driftwood. Caves are essential for breeding.
Water Parameters
Peacock gudgeons thrive in pH 6.5–7.5, GH 4–10, KH 2–6 and temperature 24–28 °C. Singapore’s PUB tap water at GH 2–4 and pH around 7.0 is on the softer side of their range, which they tolerate well. In homes without air-conditioning, ambient temperature often sits at 28–31 °C — the upper limit for this species. Ensure adequate surface agitation for oxygen exchange during hot spells, and avoid placing the tank in direct sunlight. Treat all tap water with a chloramine-neutralising conditioner before water changes.
Filtration and Flow
Peacock gudgeons prefer gentle to moderate flow. A sponge filter or a small hang-on-back filter with the output baffled works well. Turnover of four to five times the tank volume per hour is sufficient. Strong currents stress these fish and push them into corners. If using a canister or internal filter, direct the outflow against the glass wall to diffuse the current.
Diet and Feeding
In the wild, peacock gudgeons eat small invertebrates, insect larvae and zooplankton. In captivity, they accept high-quality micro pellets and flake food, but live and frozen foods bring out the best colour and condition. Frozen bloodworms, baby brine shrimp, daphnia and cyclops should form at least half of their diet. Feed small portions twice daily. These fish are not aggressive feeders, so in a community tank, ensure food reaches the bottom where they eat. A peacock gudgeon care guide that skips live food recommendations is doing the fish a disservice — variety is critical for long-term health.
Behaviour and Temperament
Peacock gudgeons are peaceful, almost shy. Males display to each other with flared fins and intensified colour, but actual aggression is rare and non-damaging. They coexist well with other calm species of similar size — ember tetras, chilli rasboras, otocinclus, and neocaridina shrimp (adult shrimp are safe; very small shrimplets may occasionally be eaten). Avoid housing them with boisterous or nippy fish like tiger barbs or larger cichlids. In a planted tank with ample cover, peacock gudgeons become bolder over time and spend more time in open view.
Sexing and Breeding
Males are larger, more colourful, and develop a pronounced nuchal hump (a rounded forehead bump) as they mature. Females are smaller, rounder in the belly, and display a visible yellow-orange band along the lower abdomen when in breeding condition. Breeding is straightforward in a well-maintained tank. The male cleans a small cave or sheltered surface and courts the female with fin displays. She deposits 30–100 eggs on the cave ceiling, and the male guards and fans them until hatching, which takes five to eight days at 26–28 °C. Fry are tiny and require infusoria or liquid fry food for the first week before graduating to freshly hatched baby brine shrimp.
Plants and Aquascaping
Dense planting suits peacock gudgeons perfectly. Cryptocoryne species, Java fern and Anubias provide the shaded understory these fish prefer. Mosses attached to driftwood create additional micro-territories. Floating plants like Salvinia or Amazon frogbit dim the light and reduce shyness. A well-aquascaped tank with strategic cave placements encourages natural breeding behaviour and showcases the fish’s colours against a green backdrop.
Common Health Issues
Peacock gudgeons are generally hardy but susceptible to internal parasites, particularly when wild-caught or sourced from crowded farm conditions. Quarantine new fish for two weeks and watch for white, stringy faeces or rapid weight loss. Treat with a praziquantel-based dewormer if parasites are suspected. Maintain stable water quality — sudden parameter shifts cause stress and increase disease susceptibility. Weekly 20–25% water changes are sufficient for a well-filtered tank.
The peacock gudgeon is an underrated gem that deserves more attention in the Singapore nano fish scene. Follow this peacock gudgeon care guide, provide caves and varied food, and you will be rewarded with one of the most colourful freshwater fish you can keep. Visit Gensou Aquascaping to see them in person and pick up suitable tank setups.
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