"Because you're diving on one breath, every second counts," says free diver Marese Secades. https://on.natgeo.com/2xGje4R

"Because you're diving on one breath, every second counts," says free diver Marese Secades. https://on.natgeo.com/2xGje4R 

https://twitter.com/NatGeoTravel/status/1148065943953793024