It depends on the person, if you are a swimmer, you can probaly hold your breath for about 7-12 strokes, but if you dont excercise your lungs, them I wouldn't reccomend for that 15 seconds
no
Holding your breath underwater is when your head/face is underwater and you do not breath.
1. Never swim alone. Always swim with a buddy or with a lifeguard present. 2. Don't practice breath-hold underwater swimming. Due to varying partial pressures of gases under deep water, it can cause shallow water blackout. You will not know when this happens, and you will go unconscious underwater. Having a lifeguard around is not a green light for breath hold swimming. They are a life guard, not a paramedic. Even if they were, there's no guarantee of revival if you pass out or drown. People have blacked out in pools before with a lifeguard present and still have died.
Hippos can't "breath" underwater but they can hold their breath for long periods of time.
Seals can't breath underwater, so they have to come to the surface for air.
To do the underwater challenge in Peru, YOU HOLD YOUR BREATH UNDERWATER DUMMIES
No. Human beings cannot breath underwater at all without an external source of air.
they have gills.
You Can't At All
they don't.
I will assume you are not joking. A fish does not hold it's breath it can breathe underwater using its gills.
A whale CAN drown- they cannot stay underwater indefinitely. When underwater, they hold their breath. They are REALLY good at holding their breath, and their bodies have adapted to doing that.