Corydoras tukano Breeding Guide

Breeding Corydoras tukano from the Rio Tiquie: soft acidic water, sexing and the documented Corydoras T-position spawning pattern (no species report).

Overview

Corydoras tukano (treated by FishBase under Hoplisoma tukano) comes from the Rio Tiquie and its tributaries in the upper Rio Negro basin of Brazil, reaching about 4.1 cm SL, and is listed as Least Concern by the IUCN (2020). It belongs to the adolfoi group of blackwater corys. No species-specific aquarium spawning report is available, so the guidance below is explicitly anchored on the documented Corydoras genus pattern.

Sexing

Following the general Corydoras pattern, females are rounder and broader-bodied than males, most obviously when carrying eggs and viewed from above.

Conditioning

Condition a mixed-sex group on a varied diet of live, frozen and dried foods. As a fish of the soft, tea-coloured, acidic waters of the upper Rio Negro, it should be kept and conditioned in soft, slightly acidic water rather than hard alkaline conditions.

Spawning Behavior & Trigger

For the genus, spawning is typically triggered by a large cooler, soft water change with increased oxygenation and flow. In the Corydoras T-position described on Wikipedia, the female attaches her mouth to the male's vent; sperm passes through her gut and is released with the eggs into a pelvic-fin pouch, which she carries to a deposition site such as glass or plants. Note: this describes the genus, not a confirmed observation of C. tukano.

Egg & Fry Care

By the genus pattern, eggs are attached to firm surfaces and hatch within a few days; fry accept microworm and brine shrimp nauplii once the yolk sac is absorbed and do best over fine sand in clean water. Species-specific incubation figures for C. tukano are not documented.