A pair of scuba divers have captured amazing footage of marine life by leaving their GoPro on the ocean floor unmanned.<br /><br />Brittany Ziegler, 34, from Maui, Hawaii, and her best friend Bettina Aelley, 38, have been live-streaming their dives on social media for two years.<br /><br />The pair started experimenting with leaving a camera on the ocean floor a year ago and have been able to capture how marine animals behave when no humans are around.<br /><br />They have captured amazing footage of sea turtles, sharks, stingrays, and the sounds of whales.
