Remote Controlled Sharks

This is a neat article talking about how scientists have implanted electrodes into the brains of sharks allowing the sharks movement to be controlled. The electrodes create in the minds of the sharks the sense of an odor in a particular direction. The strength of the phantom odor then correlates to how much the sharks turn towards it, allowing the sharks to be steered.

Other implants can thus be used to decode what the sharks are sensing and thus the sharks could be used as spies to track enemy ships or even as weapons.