So I was in my 11th grade English class today (online of course) and we read an article about how some animals have self-awareness. Most of the animals in the article were like humans and chimpanzees and other primates but at the end of the article it talked about the one outlier to this group being a fish called a Bluestreak Cleaner Wrasse.
They did a study where they put a bright dot on the fish's underside and when the fish saw itself in a mirror it tried super hard to rub the dot off. This of course means that the fish knew that what it was seeing in the mirror was itself and that the dot wasn't supposed to be there.
I googled this fish and saw that unfortunately, its a saltwater fish, but I still thought that this was interesting enough to share.