Corydoras multiradiatus Breeding Guide
Breeding notes for Corydoras (Brochis) multiradiatus, the hognosed brochis, an egg-depositor from the western Amazon basin.
Overview
Corydoras multiradiatus, the hognosed brochis, is a former-Brochis species traditionally placed in Corydoras, found in the western Amazon basin in Ecuador and Peru. Wikipedia records a maximum length of about 6.7 cm, around 17 dorsal-fin rays, and a notably long snout. It likely spawns in a similar fashion to other Corydoras, laying eggs in dense vegetation without parental care.
Sexing
Wikipedia provides no sexing detail. As in related callichthyids, mature females are expected to be rounder and broader than males when viewed from above, particularly when gravid; this is presented as a genus-level expectation rather than a species-specific record.
Breeding Setup
- A spacious, well-oxygenated tank over fine sand
- Warm tropical water: Wikipedia reports about 21-24 C and pH 6.0-7.2
- Soft to moderately hard freshwater
- Fine-leaved plants, clean glass and spawning mops as egg sites
Spawning Behavior & Trigger
Wikipedia notes only that the species likely spawns like other Corydoras, scattering eggs in dense vegetation without parental care. Following that genus pattern, a large cooler water change is the usual spawning stimulus; this is offered as a genus-level approach rather than a species-specific report.
Egg & Fry Care
Because the adults do not guard the eggs, the clutch should be protected or moved for hatching. No species-specific fry-rearing protocol is published; breeders rear the fry as for other egg-scattering callichthyids, offering small live foods once they are free-swimming.