Emotional Fish?

I'm as fascinated by the scientific study of brain as the next guy. So when they start applying fMRI technology to fish, I'm interested. Then I find out that our emotional fish is dead:

Are fMRI Studies a Red Herring?:

Functional magnetic resonance imaging (fMRI) is a technique for measuring brain activity by detecting the changes in blood oxygenation and flow that occur in response to neural activity.

Read the whole thing.

(Via First Thoughts.)