Shooting at the right face
In Newport’s experiment, the researchers presented images of different people to the archerfish by displaying them on a screen that hung over the water. If they didn’t spit at a certain face, they received a small food pellet as a reward. With these ‘bribes’, the fish showed that in 81 percent of cases, they were able to identify the one face that led to them receiving a treat from up to 44 different faces. This even applied when the pictures were shown to them in greyscale or the head shape itself was distorted.