For the U.S., Kerry is to sign the agreement Friday and then President Obama will ratify it before he leaves office in December, a senior U.S. official told CBS News in a conference call this week.
Time Frame. The average dolphin species can stay underwater for as long as eight to 10 minutes; some can remain submerged while holding their breath for 15 minutes. Dolphins breathe through their blowhole, which has a muscular flap that covers it when they go under water, keeping water out of their lungs. Size.
Dolphins don't live only underwater, they come to the surface on a regular basis to breathe through an opening in the top of their head. They can dive very deep if they need tâ¦o but then they must come back to the surface for air. Sem dolphins can stay under for up to thirty minutes .