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If you don't own the pond, or have WRITTEN permission from the owner, you cannot stock a pond with nonnative fish.
Would suckers be able to live And reproduce in a pond, I have a couple bait ponds, but we have a small frog pond that has no entrance or exit, so they could not invade anywhere else, it's a pond that was dug for fill for our house, if I put suckers in there do you think they'd survive and reproduce, also how do u trap suckers besides spearing or cage set up in a brook?