Fish are able to recognize friends and enemies.
Japanese scientists from Osaka University after studying fish behavior from a breed of cichlids found in the African lake Tanganyika, discovered she had unusual abilities.
It turned out that it can recognize enemies and friends.
Earlier, similar experiments were conducted with animals and birds, because experts believed the fish brain is primitive and unable to cope with the tasks. Now they have changed their minds since noticed that they are using drawing eyes can divide relatives on threat and friendly individuals.
A water tank was placed 8 adult males, and then they added a new individual. Initially the fish were wary of unexpected neighbors and tried to stay away from them. Therefore, the hypothesis of second memory was immediately refuted.
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