尾点兵鲶 · Long-nosed Smudge Spot Cory

Overview

The long snout and diffuse gray-black tail blotch of Corydoras ourastigma help distinguish it from several superficially similar corys. It spends more time near the floor than some rounded, open-water look-alikes. A peaceful group and clean substrate are basic husbandry priorities.

Distribution & habitat

It is recorded from Brazil's Purus drainage.

Aquarium setup

Use fine sand with smooth rocks, wood, and sheltered areas of planting. Floating cover is also useful. Provide circulation and surface movement to maintain oxygen levels. Avoid undergravel filtration and prevent waste from accumulating in the substrate, since poor conditions can damage the barbels.

Diet & feeding

Sinking prepared foods are generally accepted. Small live or frozen foods, including bloodworms, brine shrimp, and chopped earthworms, add variety. Rotate suitable offerings to maintain good condition.

Behaviour & compatibility

A shoal of at least six encourages confidence and activity. Small peaceful characins, cyprinids, labyrinth fishes, dwarf cichlids, and gentle catfishes are potential companions. Avoid large or aggressive fish.

Sexual dimorphism

From above, mature females tend to appear wider and rounder, especially when carrying eggs.

Breeding

There is no confirmed captive breeding account. Common cory techniques are possible experiments rather than demonstrated methods for this species. Provide spawning cover and air-powered filtration, condition a male-biased group, and consider cooler replacement water with stronger aeration as a stimulus. Seasonal timing and maturity may influence the response.

If the familiar sequence of pursuit, T-shaped pairing, and adhesive eggs occurs, separate the brood from adults afterward. Eggs moved elsewhere need matching water and good oxygenation, with fungal losses removed promptly. A several-day incubation and tiny live foods after yolk absorption are general expectations to verify through observation. A thin sand layer is another possible rearing approach, not a species-specific guarantee.

Notes

Body shape and snout length are useful alongside the tail marking. Rounded look-alikes may spend more time away from the floor; others have sharper black spots or a bluish blotch. The combination of an obvious long snout and a blurred gray-to-black spot is more informative than the spot alone.