There has been a number of experiments that tried to isolate chemicals produced by the decaying shark flesh to repel sharks. The theory goes that sharks will a

There has been a number of experiments that tried to isolate chemicals produced by the decaying shark flesh to repel sharks. The theory goes that sharks will avoid the smell of dead sharks, so a few groups I've tried to isolate those compounds to create a shark repellent. Not sure if any of them were fully successful. In the case of the Farallon Islands it might be that once Great Whites can smell that the orcas have eaten one of their own they know it's time to escape. I've seen at least one documentary where smaller sharks disperse when they hear the calls of orcas. Seems like it could at least be somewhat effective in areas where orcas regularly prey on sharks.