Your pet fish knows you better than you think! According to a study by scientists at University of Oxford, U.K. and the University of Queensland, Australia, your pet fish probably knows you very well and might even be able to pick you out from a crowd. The conclusion was reached after an extensive study of the archerfish, a tropical fish that can be found across India, Indonesia, the Phillippines and Australia.
Since distinguishing between faces is a complex task, it was thought to be possible in the brains of more evolved species i.e. humans, horses, cows, dogs, pigeons etc. This study put that notion to question.
Previous research has revealed that aquatic animals can distinguish between predators and non-predators, recognise fish they’ve previously socialized with previously, and even recall complex three-dimensional maps of their surroundings.