Peacock Gudgeon

The Peacock Gudgeon, scientifically known as Tateurndina ocellicauda, is a small, vibrantly colored freshwater fish native to the clear, slow-moving streams and pools of eastern Papua New Guinea. Known for its stunning appearance, peaceful nature, and manageable size, this species is a favorite among aquarists looking to add color and personality to community or species-focused aquariums.

Physically, Tateurndina ocellicauda is one of the most visually striking gudgeons. Males typically reach around 2.5 to 3 inches (6 to 7.5 centimeters) in length, while females are slightly smaller and more rounded. The body is a soft bluish-silver base adorned with vivid red horizontal stripes and accents. The fins, especially in males, are large and often edged in yellow or orange, and the tail features an eyespot (ocellus), which gives the species its name. Males also develop a pronounced nuchal hump on the forehead when mature.

In the aquarium, Peacock Gudgeons do best in tanks of at least 15 to 20 gallons, with plenty of hiding spots created using plants, driftwood, caves, and rockwork. They thrive in calm, well-filtered water and appreciate low to moderate flow. A darker substrate and subdued lighting help enhance their iridescent coloration.

Water parameters should be kept stable, with temperatures between 74 and 80°F (23 to 27°C), a pH of 6.5 to 7.5, and soft to moderately hard water. These fish are generally hardy and adaptable if water quality is consistently maintained through regular changes and good filtration.

Feeding Tateurndina ocellicauda is easy, as they accept a variety of foods. They particularly enjoy frozen and live offerings such as brine shrimp, daphnia, bloodworms, and blackworms, but they also adapt well to high-quality flakes and micro pellets. A varied diet enhances their color and overall health.

Peacock Gudgeons are peaceful and sociable, making them excellent candidates for community tanks. They do well with other small, non-aggressive fish such as tetras, rasboras, Corydoras, and dwarf rainbowfish. Males can be territorial toward one another, so if keeping multiple males, provide plenty of visual barriers and hiding places.

Breeding is relatively straightforward. They are cave spawners—males will claim a small cave or crevice and court females. After spawning, the male guards the eggs, fanning them until they hatch in about 7 to 10 days. Once hatched, fry can be fed infusoria, then microworms or baby brine shrimp as they grow.

Overall, Tateurndina ocellicauda (Peacock Gudgeon) is a peaceful, beautifully colored species ideal for planted and community aquariums. Their manageable care requirements, fascinating behavior, and dazzling appearance make them a standout choice for aquarists of all experience levels.