dr. hagger slag. it's experiment he hopes will crew. >> the reason i like the platform is it's bigger. can walk around it. the positive thing, he will be happy about this is it's about six inches under water. >> that's good. >> this is a tiger shark. it's not a long before the platform is put to the test by an 11 and a half foot female tiger shark. since the shark is dorsal fin up, a tissue and mezzewments are taken. it will provide a wealth of information, the kind scientists used to get. >> in the past, you want to know what a shark is eating. you will cut it open and look in its stomach. now using thin clips and blood that we can look at the chemical signature of the blood to learn what they are eating. >> the shark has flipped over and carolyn wheeler begins her ultrasound? >> inside the big bloated tiger shark belly are a bunch of baby sharks. very exciting first female. now, we can understand they are their breeding behaviors. >> that's what they are doing. they are doing the surgery. acoustic transmitters. precise details. >> a second trekking device to track her movements. >> t