Whats your opinion on keeping brackish fish in freshwater?

It is wrong to not provide animals the proper environment for them to live a long full life. You should have Mollies and Bumblebee Gobies in extremly hard or brackish water. Orange/Red Chromides are actually fresh water fish in a large portion of Asia. They are found in brackish water in some areas though the majority of their range is fresh. There are several other chromides you may be talking about so the latin name would be helpfull.