Breeding
When the female is ready to spawn, she will appear swollen with eggs. The males will circle and chase the females, repeatedly nudging her head and belly area. Spawning usually occurs in the early morning, and lasts several hours resulting in several hundred eggs. Eggs are usually deposited in groups of plants, and the pair will attempt to eat any that they are able to locate.
The young hatch in 24 to 36 hours, depending on water temperature. A day later, the young fish will hang on the plants, and/or the sides of the tank if the breeding takes place in an aquarium. In about six days the young are free-swimming and will seek out food. In captivity, they can be fed newly hatched brine shrimp.
Rosy barb has been successfully hybridized with the Tiger Barb (Puntius tetrazona), i.e. crossing female Tiger Barb with male Rosy Barb. The hybrids reach maturity and were all males, however they are sterile. See photo of the hybrid and the article by S Kirankumar & T J Pandian http://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?issn=0831-2796&volume=47&issue=1&startPage=66
Read more about this topic: Rosy Barb
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