Goldfish are... not quite as dumb or short-memoried as they are given "credit" for. They can be conditioned fairly easily to remember things day to day, far more than three minutes.

There's a koi river at the fish store where I used to work. When people walk past it, the fish swim away to hide and escape.

Unless you're wearing a light blue shirt. Then they swarm at you and the water teems with life.

You see... the employees' shirts are this color blue. And the fish know that it's people in this color who are going to feed them eventually. Blue means food. Even new shipments of fish very quickly learn this behavioral pattern.

If you go visit, wear a blue shirt. The fish won't remember *you*. but they'll never forget your shirt. And that alone is worth watching

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