What with nothing else in it maybe. Goldfish wont last long if you have crappie 6" or larger(2 yrs old) or largemouth bass of near bout any size. I have had bluegill and tried feedin them guppies. They didnt care for them they just pop em and spit em back out sinking. Basically what Im saying is any native sport fish will say thanks for the treats.
It can happen. We have a huge crawdad problem here in AZ because people used them for bait at one time. Using goldfish is illegal in most states and that should be enough reason not to use them, but he is correct. It can happen
So your really looking for a cheap live bait? If so, then go to walmart and buy a cast net. They work best out on the water where you can catch shad. Shad are the ultimate bait fish. But they are really dumb and in any container that doesnt have rounded edges inside it will kill them bc they will just keep bumpin the side til they die. Plus if there isnt a lot of stumps and hang ups near the bank you can do the same there for small bluegill and other sunfish if you dont have access to a boat. There is another option of buying a minnow trap. They are a lot cheaper but dont tend to get the same results as a cast net. I hope this was what you were trying to get at. It is possible but highly unlikely. Best not to find out either way.
@fshfanatic I was unaware there could be a problem with crawdads. Was this an area that didnt have a good bass population? Most bass instinctively kill crawdads, likely bc of their tenacity and they tend to destroy eggs same goes for salamanders. I guess everyone uses crawdad crankbaits when fishing out there?
Really I was just wondering how they take over, do they out-compete for food, dirty the water too much, or just reproduce so fast the other fish babies get eaten, etc?