No because they have a blow hole like a whale so they have to come up for air.
Spotted dolphins can hold there breath under water for 7 to 8 minutes
Forever
If you mean how long can dolphin stay under water, it's about 20 minutes for a common bottlenose dolphin. I am not sure about other species of dolphins.
Dolphins breathe air; they would drown if they never surfaced.
Ok for one thing dolphins don't have to be in water! dolphins are mammal.So is the killer whale
Dolphins and Whales can stay under water for so long is because they have blowholes to come to the surface and get air. They can stay under water for quite a while before they need another breath at the surface:) Need more help... Just ask!!!!!!!!!!!!!!
because they are fish
yes dolphins can stay under water much, much longer than humans can --------------- lol yeah about 3 hours longer
an opinion is what you think about it a fact is something true about it. like dolphins can't stay under water for 5 hours that is a fact and an opinion is like dolphins are cute some body might think that dolphins aren't cute but dolphins can't stay under water for 5 hours that is a fact because dolphins really can't stay under water for 5 hours or they wouldn't be living any more and we wouldn't have any dolphins and they would be extinct They would have to come up and breathe for air about every 30 min. to a hour.they can hold their breath longer than we can so that is still amazing to some people but other people might think that it is not cool but to me i think that is awesome cause nobody can hold their breath that long.that is the story between a fact and an opinion
Well the water temperature is realy realy low they survive in the water because they have thick layers of skin. and the food well they find food from under the sea
Dolphins have a thick layer of fat that insulates their bodies when the water they live in becomes too cold. They also conserve body heat when necessary.
you can not make air stay under water!