Dolphins survive by living within groups to protect one another, by eating various food found throughout the ocean and by breathing when they surface. Their bodies also help to support them after millions of years of evo... More »

Dolphins are equipped with blowholes on the crowns of their heads through which they breathe air when they reach the surface of the water. They are capable of holding their breath for up to 10 minutes. More »

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One of the most unusual dolphin species in the world, Hector’s dolphins have evolved several adaptations that allow them to survive in the oceans surrounding New Zealand. These adaptations include a relatively small body... More »

Dolphins are close to the top of their food chain with few natural predators other than sharks. When faced by a predator, dolphins often circle, head butt or use their tails to hit the other animal in self defense. Accor... More »

Dolphins grow to different sizes, with the bottlenose dolphin growing to be approximately 10 to 14 feet and weighing 1,100 lbs. while the orca whale grows to approximately 21 to 23 feet long and weights in at 6 to 10 ton... More »

Dolphins sleep by a process called unihemispheric slow-wave sleep. This kind of sleep is believed to help dolphins and other creatures recover from their daily activities. More »

Dolphins start communicating from birth by squawking, whistling, clicking and squeaking, according to National Geographic. Members of a pod sometimes vocalize in varying patterns simultaneously, much like people holding ... More »