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Dolphins

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Dolphins can hold their breath for 5 to 8 minutes. ... Dolphins usually live for 20 years, but some have been known to live for up to 40. ... – PowerPoint PPT presentation

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Title: Dolphins


1
Dolphins
  • One of the many creatures of the sea!

2
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.

3
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.

4
A glance into the Dolphin World
  • Click on the picture to view two videos of
    dolphins!

5
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. Its 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.

6
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 dolphins 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.

7
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.
  • 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.
  • Click the above picture for activity!

8
A wave goodbye from the Dolphins!
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