In a recent fMRI study, a salmon was shown a series of pictures of human faces showing various emotions: can a salmon distinguish them? and what brain regions are involved. 15 pictures, ten seconds each.

I won’t bore you with the anatomy. Because of the small size of the brain, exact brain structures could not be distinguished, but something in the brain did light up. A statistically significant number of voxels, comprising an area of 81mm3 in the midline of the brain, were active (pSo can fish interpret human emotions from a picture? I have no idea. I do know, however, that that fish can’t do it: it was dead.