Ornate nipping royal knife

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The tank with the bichir is just him and the armatus. Polys aren't typically aggressive, so its propably just curious or playful nips. I would get concernd if the poly starts leaving physical damage on the knifefish.

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ornates are the infamous bullies of the polypterus family.
 
Thats what i've always learned, and that attitude differs from fish to fish. Was hoping to have gotten lucky. They appeared to be playful nips, but it did leave a slight bite mark, and stressed the knife out pretty bad. Ill probably keep them apart, at least for now.
 
wait how big is your ornate? and what are you feeding him?
 
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