how long can dolphins stay underwater without coming up for air
Most experts agree that dolphins usually stay underwater for anywhere up to 8 minutes, the average being 3-6, however there have been occasions when dolphins have remained submerged for as much as 30 minutes and some reports of hour long dives, however there is little or no evidence to verify these reports.hen they are awake, they need to come up for air every twenty minutes or so. But when they are asleep, they can stay underwater all night long. I really have no idea how th â¦ at's possible; all I know is that my turtle stays asleep underwater all night long (8 to 10 hours).