Alright, I’ll just throw my two cents in here—fish absolutely can recognize their owners, and all that “3-second memory” stuff is just a load of nonsense people passed around for years. There’s actually been a bunch of studies debunking that old myth. Some fish, like cichlids and bettas, have shown they can remember things for months, not just seconds. I’ve personally had fish that freak out and come to the glass every time I walk up (especially at feeding time), but if some random stranger comes near, they’re way more cautious or just hide. If that’s not recognition, I don’t know what is.
I think it’s less about forming some deep emotional bond like a dog, and more about associating you with food and safety. That being said, some species are definitely smarter and more social than others. Like Ravenfreak mentioned, angelfish, oscars, puffers—all those guys can distinguish between people. I get what Nomad’s saying, but honestly, if you pay attention, you’ll notice a difference in how they react to you versus anyone else.
Anyone here ever tried hand-feeding or target training their fish? That’s a fun way to really see how sharp they can be. Don’t underestimate those fishy brains!