When Jeremiah Sullivan was a young marine biologist he wanted to get close to sharks to study them while making sure he stayed safe in the process. With this in mind, he developed the world’s first ever shark suit—basically a thin, chainmail armor outfit that Jeremiah created with material similar to that used in butcher’s gloves. His designs have evolved over the years and are now used around the world. For the sixth episode of The Deep End—Madison Stewart, Fusion’s “Shark Girl,” speaks with Sullivan about his work and mission. His shark suits protect people from the immediate danger of bites when in high-risk situations like shark feeding and research. The suits changed the way researchers and filmmakers interact with sharks and helped pave the way for the shark tourism industry that exists today.