VIEWS: 3 PAGES: 8 POSTED ON: 6/29/2012
Dolphins One of the many creatures of the sea! Dolphins • Dolphins are warm blooded mammals. They have round teeth and hair on their body, though the amount of hair they have is very little. • Dolphins are part of the cetaceans family. The cetaceans family includes both dolphins and whales. Dolphins are the “toothed whale.” • Dolphins vary in color. • Adult dolphins grow to be about 8 or 9 feet long. • Dolphins give birth to a live baby. How a dolphin breathes • Dolphins breathe through their blowhole which is located on the top of their head. • Dolphins can refill their lungs in a fifth of a second. As it breaths, the air leaves the blowhole at a speed of 100 mph. • There are complex nerve cells located around the hole that sense when the hole is near air and will then open. • If water gets into the blowhole, a dolphin will drown, so powerful muscles close the hole as a dolphin dives into the water. A glance into the Dolphin World • Click on the picture to view two videos of dolphins! More facts about Dolphins • Dolphins can hold their breath for 5 to 8 minutes. • Each dolphin has its own whistle that distinguishes it from another. It’s like having your own finger print. • Dolphins usually live for 20 years, but some have been known to live for up to 40. • Dolphins sleep partly awake. This means that they rest one side of their brain at a time. • Dolphins closest land relatives are the cow, the pig and the deer. • The gender difference between a male and a female dolphin can only be seen up close. A women has a mammary slit on the underside for birth. • The common dolphin can be found in all temperate and tropical seas. • There are dolphins that live in rivers also, but due to pollution and dams, river dolphins are in danger of extinction. The Difference between a Dolphin and a Porpoise Dolphins Porpoise • Dolphins and Porpoise are both members of the whale family. • Both have teeth. • The body type of a dolphin and a porpoise are different. A dolphin has a large forehead. • Another way to tell the difference between a dolphin and a porpoise is to look at their teeth. When a dolphin’s tooth is cut in half, it is round. All porpoises’ teeth are flat. • A dolphin has a beak-like nose and a curved dorsal fin. A porpoise has a blunt like nose and has a triangular dorsal fun. Bottlenose Dolphin • A Bottlenose dolphin is one type of dolphin. • They can grow to be 12 feet long and weigh 1,400 pounds. • A Bottlenose dolphin has a distinct beak, as you can see in the diagram located to the right. • They eat fish and squid; fish that are found at the surface of the water. • Click the above picture for activity! • Dolphins have one main predator, the shark, but often, dolphins get caught in fishing nets. • Bottlenose dolphins live in small pods of 12, but many times a bunch of small pods will join together to form a huge congregation of hundreds of dolphins. Bottlenose dolphins are very social. • Dolphins can dive down 1,000 feet and can jump 20 feet into the air. • They live in warm seas and some temperate sea waters worldwide. A wave goodbye from the Dolphins!
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