The Bajau have been gathering food using traditional free-diving methods for generations. They are remarkably skilled at spearfishing and clam collection. Scientists have now discovered an intriguing biological adaption that could help them cope with such a rigorous aquatic lifestyle.

The Bajau have spleens that are noticeably larger than those of nearby populations, according to research. Despite not being frequently linked to diving prowess, the spleen is essential for storing oxygen, according to National Geographic. The spleen contracts and releases oxygen-rich red blood cells into circulation when the body is submerged in water when oxygen is limited. This natural boost can increase the body’s ability to hold its breath.

“It’s like a biological scuba tank,” explained Melissa Ilardo, lead author of the study from the University of Copenhagen, in an