A marine biologist nearly dived straight into the gaping mouth of a 16-foot tiger shark as she was preparing to enter the ocean off the coast of Hawaii.
A heart-stopping clip shows Ocean Ramsey preparing to jump off a boat and enter the water in Haleiwa when a shark named Queen Nikki approaches her.
Footage taken by the woman's husband, Juan Oliphant, shows the shark swimming towards the boat before coming out of the water and snapping at Ms Ramsey's fins.
