Fish have a simpler brain than humans and entirely lack the section of the brain that humans use for [recognizing] faces.
The fact that archerfish can learn this task suggests that complicated brains are not necessarily needed to [recognize] human faces.
But, that’s not the only thing that makes this discovery so amazing. Sure, humans basically look similar, which makes distinguishing between their faces a tricky task, especially for a fish. Fish, however, apparently lack the parts of the brain that humans use to identify faces