Research shows that in reality the Scent of Blood does not attract Sharks and its a myth. As explained by Cristina Zenato , a ocean and cave explorer and shark behaviourist ” We are women, and we scuba dive. Our menstrual cycle should not be taboo but something we should be able to discuss and share information about. Let’s start with debunking the myth that blood will attract SHARKS.  That is totally and completely incorrect. Sharks are not attracted by human blood and women on their period dive with sharks without attracting undesired attention. It takes more than a faint scent of blood to draw a possible predatory shark “