I would venture to say that you can not use them for bait. As kids we would always use them for bait and my father told us one day that we couldn't. I never used them for Stripers, but the large mouths loved them.
I was considering this about a week ago. I used some gold fish to cycle a new fish tank and was tempted to take them for bait. I figured after being impaled and dragged across the ocean floor in saltwater their survival would be slim to none. The chances of two of them finding each other and starting a colony of Gold Fish off the Jersey Coast even less. But entering a new species in any waters is a bad idea in general. Whether it's fish or plants or insects or anything. Big trouble can come from tiny critters!!!
Against fish game and wildlife "rule's and regulations". Buy shiners...put them in an Igloo cooler...Keep some Ice in the water...airiation helps...Place a coffee can in the waters edge where you are fishing...put some of your bait cooler water in it...place it bankside in the waters edge where you are fishing...aclamate the shiner's too the ponds water temperature...after 15 minutes,begin "Live-Lining" and fishing with your shiners,replacing one into the can as you use them.do not put more than a couple at a time in the can because as they aclamate to the warmer water they will begin to die!If your shiners are living longer while fishing...time things out so that your costly shiners are not stressed; Attatch a shad dart or jig head too a little spinner bait harness then tip the dart or jig with your dead shiners...The retrieve action will make the shiners appear to be "Alive". Convience in buying goldfish for bait as well as introducing them to the new waters is Wrong!!!BarryTheBass