Marine biologist Nan Hauser was saved by a humpback whale while diving in the Cook Islands.
The whale protected her for nearly 10 minutes as a tiger shark roamed nearby.
"Humpbacks are altruistic," Hauser shared. "They have this incredible behavior where they will rush into the situation and save another species."
Watch her incredible story below!
Can't get enough? Here's Hauser's original raw footage!