Fish can recognize human faces
Fish can be trained to recognize and distinguish different human faces
But scientists, including Canadian Dr. Cait Newport, Marie Curie Research Fellow at the University of Oxford in England, wanted to know if a small, less complex brain than our own - a fish, for example - was capable of human facial recognition.
In her experiment, archerfish were trained with a food reward to recognize a specific human face when paired with as many as 44 other faces. They did this with over 80 percent accuracy. The study demonstrates that a complex brain is not necessary for human facial recognition.