Corydoras solox Breeding Guide

Breeding Corydoras solox from French Guiana: sexing, conditioning and the documented genus T-position spawning pattern (no species-specific report).

Overview

Corydoras solox occurs in the Oyapock River basin and smaller coastal drainages of French Guiana, in sandy freshwater creeks at 0.5-2 m depth. FishBase records it at up to 6.3 cm SL and lists it as Least Concern (2021). No species-specific aquarium spawning report is available, so the guidance below is explicitly anchored on the documented Corydoras genus pattern.

Sexing

FishBase notes that mature males have uniformly very thick pectoral spines bearing fine needles. Following the general Corydoras pattern, females also become rounder and broader when carrying eggs.

Conditioning

Condition a mixed-sex group on a varied diet of live, frozen and dried foods. FishBase reports parameters of 22-26 degrees C, pH 6.0-8.0 and hardness 2-25 dH for this species.

Spawning Behavior & Trigger

For the genus, a large cooler water change with increased oxygenation and flow is the usual trigger. 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. Note: this describes the genus, not a confirmed observation of C. solox.

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. Species-specific incubation figures for C. solox are not documented.