Monofins and Mermaids. Attaching one big fin to your legs makes you seriously fast underwater. The world record time for swimming 50 meters is about 21 seconds, but watch these guys do it in 14 seconds:
Monofins and Mermaids. Attaching one big fin to your legs makes you seriously fast underwater. The world record time for swimming 50 meters is about 21 seconds, but watch these guys do it in 14 seconds:
