just go to this site and it will tell you a lot of ways to hold your breath underwater.
www.wikihow.com/Hold-Your-Breath-for-Long-Periods-of-Time
they can hold their breath 20 minutes under water
Beavers can hold their breath for 10-15 minutes under water.
They do not breathe under water, they just hold their breath for long periods of time.
They don't. When submerged, dolphins hold their breath.
Practice
No, but they can hold their breath up to six minutes long.
Sea Snakes can hold their breath for up to an hour.
Yes they do, but they also breath under-water. They can breath under-water for 14 hours.
39min
1.62 seconds
They're able to hold their breath for about 2 hours.
for 50000000 years