A lot of people consider dolphins to be one amongst the fish - as they swim in the water. But in reality unlike fish who lay eggs, dolphins are warm-blooded mammals that give birth to baby dolphins and breathe air. There are many more unique characteristics that make dolphins an interesting creature on the earth.
If you're ever had the opportunity to be near a dolphin you'll understand why they are as unique as they are. Dolphins, just like whales, are considered to be cetaceans and are part of the grouping of whales that are called odontocetes, which means that they have teeth. The teeth found on a dolphin are shaped like cones. Other whales fall into the group called mysticetes, in which case they don't have teeth to use for feeding.
You'll be able to find dolphins living in tropical, warm waters around the world. Unknown to most people is that there are a few species of dolphins that live in rivers and freshwater. These dolphins, however, are few in number and are now considered to be on the endangered list.
Fifty-seven different species of dolphin make up the world's population today. Dolphins have sleek bodies and their noses, called "rostrum", are long and beak-like. Many of us think that dolphins and porpoises are related, when in fact they are not. One thing that makes them different is their teeth. As mentioned the dolphin's are cone shaped and the porpoise have teeth that look more like spades. This enables them to dig for food among rock. The other major difference is the fact that porpoise are able to live in water that's colder than a dolphin can even tolerate.
Orcas are the most easily identified and best known dolphin. They are more commonly known as killer whales. People tend to think of the Orca as among the most violent and frightening sea animals. This is probably due to the fact that they are large and seem fearless in the water.
Female dolphins are pregnant for twelve months before delivering their babies, or calves as they are known. The calves weigh between 30 and 40 pounds and are about 30 inches long. They will nurse from their mothers until they are two years old.
Unlike other species of animals where the mother gives birth and the young leave her side after a short period of time, the dolphin calf will stay with its mother for five to seven years. During this time the young dolphin will learn many skills from its mother, including how to feed and how to get along with other dolphins.
Dolphins live in groups known as "pods" and travel together. The females interact with the young, while the males keep more to themselves and don't participate in parenting.
Dolphins are amazingly intelligent and curious. These traits make them intriguing to us, along with the fact that dolphins love to interact with humans. They are always ready to tell us all about what's going on in the waters around us, but unfortunately we aren't able to understand them.
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