I saw nothing on the ground that was over 2-2.5". IF they were small carp how large could they get? Like I said earlier, I won't be able to control the flow of these fish into my pond nor do I think the tanks these came from could support much life. My concern is that they could be something invasive because even though I have a very small pond (approx 1/3 acre) I would love to make it into a crappie pond, which will be tough enough without having to deal with unwanted fish. Gonna google shiners and see what comes up. Keep the ideas coming and tomorrow I'll take more pics from different angles.