This reminds me of a dream I had the other night, where I was watching Finding Dory (a movie I never saw IRL, but did see the trailers for), and it got to a scene where Dory, along with Nemo and Marlin, where searching all the fish tanks in a pet shop.
Dory couldn't find her parents there, and the movie ended with her deciding to become a pet fish, which made me feel a bit sad in the dream.
Later on in the day, after I woke up, I searched up the Wikipedia page for it, and was glad the movie wasn't like my dream LOL
