Peacock Gudgeon (Tateurndina ocellicauda) is a small, colourful freshwater fish from eastern Papua New Guinea (rainforest streams and ponds). Common names include Peacock Gudgeon, Peacock Goby, and Eye-spot Sleeper. It is a sleeper/gudgeon in the family Eleotridae (pelvic fins are not fused). Peaceful, relatively easy to keep, and a good candidate for planted nano or community tanks. Their colours intensify with a good diet, stable conditions, and dark substrate.
SEXING: Males are typically more intensely coloured with longer fins, a more robust head, and often a slight nuchal hump as they mature. Females tend to have rounder bellies (especially when carrying eggs) and more yellow on the belly/fin edges. Both show orange-red spotting or bars on a blue-grey or silvery body, with yellow and blue accents on the fins.
TANK SET UP: Longer tanks suit their horizontal territories better than tall ones. Fine sand or smooth gravel (dark preferred to enhance colours). Heavily planted with Java fern, Anubias, Cryptocoryne, floating plants, and mosses. Provide plenty of caves, rock crevices, driftwood, and leaf litter. Caves are essential for security and breeding.
TANK MATE: • Substrate: Fine sand or smooth gravel (dark preferred to enhance colours).
• Décor: Heavily planted with Java fern, Anubias, Cryptocoryne, floating plants, and mosses. Provide plenty of caves, rock crevices, driftwood, and leaf litter. Caves are essential for security and breeding. Include a secure lid—they can jump.
FILTRATION: Gentle, low flow only. Strong current stresses them (they are not strong swimmers). Sponge filters or baffled hang-on-backs work well.
MAINTENANCE: Ammonia/nitrite 0 ppm, nitrate < 20- 40 ppm. Perform 20–30% weekly partial water changes.
FEEDING:
• Staple: High-quality micro pellets or small sinking pellets once acclimated.
• Preferred: Frozen or live foods — brine shrimp, daphnia, bloodworms, cyclops, or similar small invertebrates.
• Feed small amounts 1–2 times daily
IMPORTANT: They may ignore food that sinks too quickly or is too large; targeted feeding near their preferred areas helps shyer individuals.













