Pearl by Josh Malerman (Bird Box).
It’s about a pig on a small farm that can seep into your mind and make you do and see terrible things. I picked it up after reading Bird Box and a few other books of his, which I enjoyed. I expected to give up on it based on the silly 80s horror movie premise, but the book is truly demented and creepy and I felt existentially weird after reading it
I’m an elder millennial and I have had absolutely no problem buying goldfish into adulthood. With this change, i’ll inevitably be calling them Chilly SeeBas, so idk how much more adult they’re going for in my demographic