Reminds me of the delightfully strange short story by the Argentinian writer Julio Cortázar:

‘Axolotl’ is narrated by a lonely man who regularly visits the local zoo, where he becomes fascinated by the axolotls in the aquarium. In time, he states that he, too, is an axolotl, and feels he has become one of them.

https://ambystoma.uky.edu/teachers_materials/axolitbook/Axol...