A couple of articles I found. Seems fish know mirrors are fake somehow.
https://www.quantamagazine.org/a-self-aware-fish-raises-doubts-about-a-cognitive-test-20181212/
https://www.nature.com/news/fish-fail-to-see-reflections-as-rivals-1.16099
They have a wrasse that can respond to changes in its appearance based on what it sees in the mirror, and try wiping off painted on 'dirt' (first link), and a bunch of cichlids that respond differently to a mirror than to a rival. (second link)
Just food for thought.
https://www.quantamagazine.org/a-self-aware-fish-raises-doubts-about-a-cognitive-test-20181212/
https://www.nature.com/news/fish-fail-to-see-reflections-as-rivals-1.16099
They have a wrasse that can respond to changes in its appearance based on what it sees in the mirror, and try wiping off painted on 'dirt' (first link), and a bunch of cichlids that respond differently to a mirror than to a rival. (second link)
Just food for thought.