Do different Corydoras species cross-breed?
Are there cross-breeds among the different Corydoras species?
there have indeed been reports about hybridizations of that kind. It is therefore advisable to keep just one Corydoras species per aquarium as to maintain pure species.
If nevertheless there has been cross-breeding and the juveniles are given away, other aquarists should be informed by all means that they are hybrids. Also, you should inform the receiver about the species that led to the hybrid form.
Dr. Bodo Schnell