Fish in the fMRI?

Functional MRI (fMRI) is a technique of brain imaging that allows researchers to see what parts of the brain respond to stimuli, resulting in interesting images of real brains.

Craig Bennett, a postdoctoral researcher here at UCSB, put an Atlantic salmon in the fMRI machine and, based on the scans, found that the fish could apparently detect and respond to the the emotional state of human beings (poster).

But the fish was dead.

Is this voodoo correlation? (In brain imaging studies, wherein some false positives cannot be statistically eliminated without removing real data.) Or, as Wired puts it, "Scanning Dead Salmon in fMRI Machine Highlights Risk of Red Herrings".