Toothed Piabucus

Piabucus dentatus is a small to medium Amazonian characin notable for the enlarged, prominent teeth that give it its species name. It reaches about 9 cm and displays a striking dark lateral stripe on a silver body. In the wild it feeds on invertebrates, small fish, and organic matter in soft, warm Amazon tributaries. It is a peaceful schooling species despite its somewhat predatory dentition and is suitable for soft-water community aquariums.

In captivity Piabucus dentatus does best in groups of eight or more in a minimum 120-litre aquarium with soft, slightly acidic water, good plant cover, and regular water changes. It is an active, mid-water schooling fish that should be kept with other peaceful South American species of a comparable size. Nano fish or very small tetras may be harassed due to its slightly predatory nature.

Feeding is straightforward — small pellets, frozen bloodworm, brine shrimp, and daphnia are all accepted. Piabucus dentatus is not commonly encountered in the trade and is sought after by collectors of unusual SA characins. Its bold striped pattern and interesting dental morphology make it a conversation piece in specialist planted aquarium displays.

Water: Soft, pH 4.5–7.0, 24–28°C; planted conditions; regular water changes. Tank: 120 L minimum; planting and driftwood; group of 8+. Feeding: Omnivore — small pellets, frozen bloodworm, brine shrimp, daphnia. Breeding: Egg-scatterer; possible in soft, warm conditions. Compatibility: Peaceful with medium SA species; may harass very small nano fish.