You should never mix species. Ever. It's a dangerous game. Tipnatee you also were not ripped a new one, as I observed the whole conversation. Why you'd let your axolotls jump on your goldfish is beyond me, I can only imagine how stressed your goldfish was.
OP just don't think about it, then there's no problem. Bigger fish will nip at the axolotl and not to mention the bioload. ?
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