I feel like this is just another study without enough testing done. You can still have a bad memory if you simply explicitly remember the last thing you did, or one thing, or just utilize a food reward. I don't see food rewards that are necessary for survival as a good indicator of good memory.
RuneKatashima t1_isedq0r wrote
Reply to Scientists have proved goldfish do have good memories and are able to navigate their surroundings. A team from Oxford University trained nine fish to travel 70cm (2.3ft) and back, receiving a food reward at the end. The study disproves the long-held belief goldfish have little or no memory. by Tardigradelegs
I feel like this is just another study without enough testing done. You can still have a bad memory if you simply explicitly remember the last thing you did, or one thing, or just utilize a food reward. I don't see food rewards that are necessary for survival as a good indicator of good memory.