Great White sharks are a rare sight for the divers, who were shocked when the giant frame of Great Blue emerged, dwarfing the tiger sharks and that they had expected to see swimming around a sperm whale carcass off Oahu, Hawaii's third-largest island.
Ocean Ramsey, told the Honolulu Star Advertiser: "She was just this big handsome gentle giant wanting to use our boat as a scratching post".
"She was just this big attractive gentle giant wanting to use our boat as a scratching post", added Ramsey, who swam with the shark all day and captured stunning pictures.
'We had a very long attractive dive with her and we were all very much enthusiastic about the encounter'.
Ms Ramsey added: "She looks like she may be pregnant: She's shockingly wide". "Additionally, since sperm whales are protected by the federal Marine Mammal Protection Act and Endangered Species Act, any violations could bring about federal charges as well...no matter whether they happen within state jurisdiction or further out to sea in US waters", said Jason Redulla, the chief of the Hawaii Division of Conservation and Resource Enforcement, according to to the Hawaii Department of Land and Natural Resources (DLNR).
The stench of rotting sperm whale tempted a massive 50-year-old celebrity shark known as "Deep Blue" out of retirement.
The home page for Ms Ramsey shows a looping video in which the marine conservationist, free diver and model reaches out and touches two sharks. Deep Blue became an icon several years ago during Shark Week on the Discovery Channel, through her remarkable size and age.
Hawaii waters are usually too warm for great whites compared with California's Pacific coast, where they feed on sea lions and elephant seals, Ramsey said. "If you want to talk about sharks being not risky, get your picture taken with a different species, not that one".
Ocean, though, discourages people from following her lead and swimming with sharks. "And I've been working with great whites for over 10 years".
Deep Blue stopped by for a bite and Jeffries filmed her as she munched on the dead whale.
"Shark populations around the planet are severely declined", she said.
Ramsey and Oliphant later told the Associated Press that they hope to use the now-viral images to push for legislation that would ban the killing of sharks and rays in Hawaii. Any expert will tell you, we kill by far more of these great fish a year than they do us.
"Social media is definitely whipping this into a frenzy", said Jason Redulla, chief enforcement officer with the Department of Land and Natural Resources. "I hope she survives because we need more big, healthy, pregnant sharks out there". "Understandably, some people want to get into the water either out of fascination or to get photographs, but it is truly unsafe to be around this carcass with so much shark activity", agency official Jason Redull said.