Dolpinh

Dolphins
Dolphins, like you and me, are mammals. They have teeth, are warm-blooded, have a four-chambered heart, and nurse their young from mammary glands. Dolphins also have hair — but not verymuch! Dolphins belong to a group of mammals called cetaceans.
Where do dolphins live?
All over the world — from colder northern and southern waters to warm tropical waters. The bottlenose dolphinprefers warmer water.
How fast do dolphins swim?
We don't know how fast most dolphins swim but bottlenose dolphins typically swim at 3 to 7 miles per hour. They can go over 20 miles per hour when theywork hard. The body shape of a dolphin helps it swim fast. A dolphin's body is shaped like a tube that is pointed at both ends. This streamlining helps the water flow over the dolphin's body as itswims.
How do dolphins stay warm?
Even though dolphins are warm-blooded, and their internal temperature is about 98 degrees, they need to conserve their body heat in colder water. Like most whales, thedolphin's body is surrounded by a thick layer of fat (called blubber) just under the skin that helps keep the dolphin warm.
What do dolphins eat? 
Mostly a variety of fish and squid, depending onwhat part of the ocean they live in. The bottlenose dolphins in the Indian River Lagoon eat mostly fish because there aren't many squid in the lagoon. A dolphin's cone-shaped teeth interlock to catchfish. Their teeth are not used to chew, and they swallow their food whole.
How do dolphins communicate?
Just like dogs, cats, and other mammals — by using sound, vision, touch, and taste. Dolphinsdon't have the ability to smell, however. Scientists do not think that dolphins have a language like humans. Each dolphin can make a unique signature whistle that may help individual dolphins recognizeeach other, but it may just help a dolphin know that some other dolphin is nearby. Scientists don't know for sure.
How intelligent are dolphins?
We don't know because no one has given them an...