I think we're giving fish too little credit when it comes to memory and recognition. The whole "3-second memory" thing is a myth, and research has debunked it. Some fish have memories that span months! I'm not saying they’re about to win Jeopardy, but they recognize patterns and routines, which is a form of memory.
Some people mention that their fish react differently when they approach the tank, and this is totally possible. Just like dogs wag their tails, fish do show excitement through their movements. It's not just random splashing. Some species, like bettas or cichlids, have been observed remembering and recognizing their human caretakers. They know who feeds them and who cleans their home!
But yep, it might vary depending on the species. Some are more curious and interactive, while others just don’t care. They're a bit like cats in that way—some will ignore you unless you have food, and some are downright social. So, yeah, fish recognizing their owners isn't just wishful thinking. It’s more about understanding and observing their behavior over time. Fish might not wag tails, but they do have their own ways of showing they know you!