Fish in their new 600 gallon tank 2

months.I have concerns that there is something genetically off with this fish and it may not reach full size and possibly adulthood. Also, there is a rescued Pangasius hypophthalmus catfish (or ID shark) that is about 16" or so, and a boisterious 17+" giraffe cat. There are also 2 pseudodoras or oxydoras niger catfish that are about 20+" and 18 months old. These are all young fish that will very much out grow this tank, and need to be upgraded to a tank holding about 3000+ gallons. ... Fish " ...