Divers near Oahu were monitoring tiger sharks feeding off a decomposed sperm whale when they encountered what some would regard as their greatest fear, but for them, an incredible discovery – a great white shark.

And it wasn't just any great white. According to marine biologist and conservationist, Ocean Ramsey, who is seen in the video, the shark in question was Deep Blue. The 20-foot-long creature is believed to be one of the largest on record and has created such a name for itself in the world of marine biology that it even has its own Twitter account.

The filmer, who took the footage on January 15, recounted the incident to Newsflare.

"When we first got there there were a bunch of tiger sharks feasting on the carcass and then suddenly they all swam away, probably sensing what was approaching," the filmer said.

The 50-year-old shark later swam right by the carcass towards the divers, seemingly more interested in the group than the whale carcass.

"She then made her way out to the surrounding boats to check them out as well. After that she slowly descended and swam off," the filmer said.

Great whites are uncommon in Hawaii's warm waters, Ramsey said, but hunger could have driven the shark out of its comfort zone.

State wildlife officials took to Facebook to discourage the public from approaching the rotting whale carcass and the wildlife it attracts, warning that the shark may mistaken divers as food.

A group of us went so see a whale carcass. When we first got there there were a bunch of tiger sharks feasting on the carcass and then suddenly they all swam away probably sensing what was approaching. After waiting in the water for about 30 min Deep Blue, a 22 ft female great white - thought to be the biggest shark of its kind in the world- swam right by the whale carcass to come check us out. She swam right up to me. she made a pass by the group and circled back around toward the whale for what looked like a test bite or maybe just a small nibble. She seemed curious about the divers and had little interest in the whale itself. This might be because from the looks of it she had already had quite a bit to eat. She then made her way out to the surrounding boats to check them out as well. After that she slowly descended and swam off. Deep Blue is believed to be around 50 years old, and half the length of a bus. The woman in the video riding Deep Blue is Ocean Ramsey, a local shark conservationist.

Brief video of the whale carcass

a group of free divers just hanging out around a few day old sperm whale carcass off the south shore of Oahu. Waiting for sharks to approach.