Claims for mirror self-recognition have been made for numerous species ranging from dolphins and elephants to fish and ants; reproducible experimental evidence is avaialable only for some great apes

Gallup, G. G., Jr., & Anderson, J. R. (2019). Self-recognition in animals: Where do we stand 50 years later? Lessons from cleaner wrasse and other species. Psychology of Consciousness: Theory, Research, and Practice, Sep 2019. http://dx.doi.org/10.1037/cns0000206

Abstract: Claims for mirror self-recognition have been made for numerous species ranging from dolphins and elephants to fish and ants. But based on rigorous, reproducible experimental evidence only some great apes and humans have shown clear, consistent and convincing evidence that they are capable of correctly deciphering mirrored information about themselves. In this article we critique some of the recent claims for self-recognition in other species and summarize some of the cognitive implications of the capacity to become the object of your own attention. Recent neurobiological evidence now appears to validate the connection between self-recognition and self-awareness.

Check also A Killer Whale’s (Orcinus orca) Response to Visual Media. Pepper Hanna et al. International Journal of Comparative Psychology, 30. https://www.bipartisanalliance.com/2017/10/a-killer-whale-watches-other-cetaceans.html