Dolphins do not breathe underwater. Before they dive, they take a big breath. They hold it while they are underwater.
Dolphins are mammals. Just like all other mammals, they require air to breathe. They breathe air through their blowhole. They return to the surface every few minutes to take another breath. While underwater, the blowhole closes so no water can get into their lungs and cause them to drown.
Since dolphins cannot breathe under water, they have adapted the ability to eat underwater. No air is taken in through the dolphin's mouth, so they are able to catch fish without drowning.Learn More
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A group of whales is known as a pod. While not all species of whales are always seen in groups, whales form pods that range from a few animals to groups of 40 or more.Full Answer >
The blue whale is the largest mammal on earth. This species reaches lengths of 100 feet long and weighs up to 200 tons. The blue whale is believed to be the largest mammal ever to exist on earth.Full Answer >