MENTAL CONDITIONING: A barracuda was starved, then put in large tank. A glass pane was inserted and a mackerel placed behind it. The barracuda banged itself into the pane five or six times, then conditioned itself to stop just short of glass pane. The glass pane was then removed. The barracuda continued to stop just short. A second barracuda was placed in tank – it quickly caught the mackerel thus “blowing” the first barracuda’s mind!