-In addition to Bill's comments on goldfish colouration, I have also noticed that environmental and diet factors play a role in colouration as they do to most other species.
Again, there is no reason with adequate numbers of varying sizes of bass that goldfish would overpopulate. Of course if there are no predators they will take multiply until the carrying capacity of the water body is reached, then as with other fish they overcompete for forage and stop growing very fast. Goldfish also feed heavily on their own eggs so there is a point at which their numbers will plateau. I personally don't see any reason why goldfish should be excluded as a potetial forage fish in private waters. (Those that have no outflow)


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