Aquarium trade has been the source of many alien species being introduced into the natural waters of Chennai. Trichopsis vittata and Macropodus opercularis are being reported for the first from Chennai. However. contrary to the propagule pressure theory both these species are not common in the aquarium trade. https://www.bekindtopets.com/great-pick-Nobivac-Feline-1-HCPCh-special-find/