Corydoras ortegai Breeding Guide

How to breed the Loreto Corydoras (Corydoras ortegai): sexing, conditioning, the cooler-water spawning trigger, T-position pairing and fry care, based on the documented genus pattern.

Overview

Corydoras ortegai, the Loreto panda cory (catalogued by FishBase as Hoplisoma ortegai, Britto, Lima & Hidalgo, 2007), is a small armoured catfish reaching about 4.5 cm. It is known from tributaries of the lower Rio Putumayo in Departamento Loreto, Peru, near the Colombia-Brazil border, in lotic muddy-brown habitats over soft clay and sand, and is a facultative air-breather (FishBase). IUCN lists it as Least Concern. No species-specific spawning reports are available, so the procedure below follows the documented Corydoras genus pattern and species figures are approximate.

Sexing

As in the genus, mature females are the larger, rounder and broader-bodied sex, most obvious from above when they are gravid. Species-specific sexing notes are not documented in the consulted sources.

Conditioning

Condition the group on a varied diet of small sinking dried foods plus live and frozen items to bring females into spawning condition. Keeping the species in a group of six or more supports the natural behaviour that precedes spawning, and well-fed females fill visibly with eggs.

Breeding Setup

Provide a separate tank with fine sand, gentle sponge filtration and fine-leaved plants or spawning mops. Fine sand suits a species that in the wild inhabits lotic muddy-brown habitats over soft clay and sand (FishBase). Soft, slightly acidic, warm water consistent with its tropical lowland habitat is appropriate; reference temperature and chemistry from the species' habitat data and conspecific Corydoras.

Spawning Behavior & Trigger

Genus spawning is induced by a large cooler water change with increased oxygenation and flow, repeated daily. Pairs adopt the T-position, the female cupping eggs in a pelvic-fin basket while collecting milt and then attaching sticky eggs to glass, broad leaves or a mop. Egg counts specific to C. ortegai are not documented in the consulted sources.

Egg & Fry Care

Adults predate eggs, so remove the parents or the eggs after spawning. Genus eggs typically hatch in about 3-5 days, and fry take microworm and newly hatched brine shrimp once the yolk sac is absorbed. Maintain stable, clean water throughout rearing.

Common Challenges

The lack of published spawning data for this recently described species, the need to condition females and provide a cool-water trigger, and egg predation are the main challenges. Egg fungus and fry-stage water quality are the usual causes of loss.