you mentioned jellyfish, a mosquito, hipos, deers, bees, dogs,ants and cows. don't know how that happens. >> once we put the numbers into perspective. you have a calming effect and lets us enjoy our time in the water. the truth is, you are much more in danger of drowning than you are of being attacked by a shark. so really there are safety concerns but about being in the water in general. gerri: i got to tell you all the movies, we're obsessed with sharks, sharknado, tv shows dedicated to sharks, why are we interested in these? >> fascinating animals. apex predators. gerri: what is apex? >> on top of the food chain, big predators that take prey. in the same way we're fascinated with tigers or lions or bears, we are fascinated with the animals because they are predators, they are ancient animals, they've been around 250 years, and they're in real danger and we need to protect them. gerri: two questions, why do they attack when they attack? we had an example not too long ago, and what should i do if sw sharks? >> it's pretty clear the reason humans are attacked