No its not true. They will keep growing (a lot slower) but will still grow and have major damage done to there body. Most isnt visible but ive seen some really messed up fish that were kept in tanks to small. bent backs, folded tails, scraped off faces. Its a terrorable idea.
missusmcmattern29- you can feed them any meaty items. I feed mine: squid, whitefish, convicts, talipia, red/blood/black/earth worms, krill, prawns, pellets. I dont feed any of my fish goldfish or commets. And mine go to the top to get air all the time, well my ornate doesnt but all my other bichirs do.
Mine has grown from 2"-9" in about 3.5-4 months