A former U.S. Navy deep sea diver and a marine naturalist/conservationist Eli Martinez (the go-to expert on shark behaviour), intentionally dove into the water with a monster mako shark in order film its behaviour. The result of this dangerous expedition was the filming of what is believed to be the largest mako shark ever captured by an underwater camera team without using a cage. On September 24, 2015, just off the coast of Southern California, Berg and Martinez jumped into the water with the majestic mako shark, which was a battle scarred female measuring more than 11 feet long and weighing an estimated 900-1,000 pounds. Just 40 miles off the coast, in an area known as the Southern California Bight, is monster mako country with sharks ranging in size from nine feet to more than 12 feet and from 700 to 1,300 pounds.