Sharks migrate same paths for 100s of miles, the same way migrating birds do on aground of a geomagnetic thingy in their brains, knowing this we could send out artificial magnetic signals to guide them to certain locations, where they would be rewarded with treats Eventually you could set sharks on a course, and train them to show up in a certain area, where they would be primed to expect food.
Eventually you would have your own army of remote controlled sharks and owners of tropical islands would then have their own defence networks.
If you plan to use this as a movie idea I expect 200k up front plus something on the back end. If you want it to work Snoop Dog should appear in a cameo, and Doug E. Doug from Cool Runnings have one of the key roles.-- bob, Jun 14 2014random, halfbakery