© David Clode, unsplash.com
It is often claimed that fishes, especially goldfishes, have a poor memory. Yet science was able to prove as early as the 1950s that goldfishes have a relatively good memory. Other fish species also have an amazing memory. Cleaner fishes can remember up to 100 individuals that they clean of food scraps in their mouths. They show preferences as to who they prefer to clean. Experiments have also shown that wild fishes can remember being caught in a net for up to 11 months: they hide more often.
