They don't.
When submerged, dolphins hold their breath.
because they can not breath under water that long? because they can not breath under water that long?
They do not breathe under water, they just hold their breath for long periods of time.
they can't breathe under water
Yes they do, but they also breath under-water. They can breath under-water for 14 hours.
Beavers can hold their breath for 10-15 minutes under water.
No, but they can hold their breath up to six minutes long.
they can hold their breath 20 minutes under water
Practice
no, but they can stay underwater for a long time
39min
1.62 seconds
You can't breathe under water but you can hold your breath for an extremely long time and you can also see under water.