Sara Campbell, popularly known as Dolphin Girl, has earned her sobriquet for her unique free diving skills. She can hold her breath for astounding four and a half minutes. She holds world record for diving 90 m deep. She is planning to go farther and attempt what has been accomplished by the few.

She is preparing to take over the most challenging of all, The Arch in Dahab, Egypt. It is a huge archway, or tunnel, connecting the Blue Hole - a massive abyss - with the open ocean. To complete the dive, Sara must first swim down 55 meters to the tunnel entrance. Then she will try to swim another 35 m through the tunnel and then up to the surface. In all she will be covering around 145 meters in all, while holding breath at the same time.