>> i see one coming up. a nice one. the biggest one yet. >> using new cameras including a robotic shark-cam. >> let's go! >> discovery channel follows the legend. not just underwater. but through the tales of the storied bayous. >> that's what they're calling it down here. the voodoo shark. >> linsey davis, abc news, new york. >> sharks weren't scary enough. now we have a voodoo shark. doubly scary. >> creepy. >> celebrating shark week. little quiz. tai, play along. it's multiple choice. try to make it as easy as possible. the first question. sharks can detect blood because they have a strong sense of smell, sight, x-ray vision, sonar? >> i feel kind of dumb. smell. >> i will say smell. i'm going to say smell. yes! >> one for one. here's the next one. >> parthenogenesis is when a