Oscar Size And Age. Oscar fish experience most of their rapid growth in the first year, with sizes varying based on care and environmental conditions. The oscar cichlid is native to the south american river basins, along with many other cichlid species.
In their natural habitat, which consists of the amazon river basin and other south american bodies of water, oscar fish have been observed to grow to an. 1 comment / by fish laboratory / november 24, 2023.