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🐬 Dolphins 🐬

Published on Nov 19, 2015

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PRESENTATION OUTLINE

DOLPHINS

BY MAYA SATSIA

Dolphins are very intelligent animals. They are mammals not fish, a mum dolphin is called a cow, the dad is called a bull and the baby is called a calf.


The Dolphin's Body

They have a nose and the ears are barely noticeable.When dolphins sleep they have to shut half of their brain down, but if they go into a full deep sleep, they will suffocate.

Dolphins have highly good vision above and under water. The average temperature is 36.7 degrees.


Babies

Dolphins give birth to one baby at a time. Dolphins only have hair when they're babies and born tale first. The mother dolphin looks after her baby between 3 to 8 years.


Dorsal fin

The dorsal fin is located on the top of the dolphins back. They can have all different size fins. The fin is made up of tissue and helps them steer.


Median notch and fluke fin

The flukes are located on the end of the peduncle. The peduncle connects the dolphins tale with the body. In between where the flukes meet is the median notch. The median notch is what separates the two flukes from each other.



Pectoral fins

The last fins are the pectoral fins, they help the dolphin to stop and turn. Adult pectoral fins are about 11-19 inches. The fins are located on either side of the dolphin.

The mouth

Dolphins coned shaped teeth interlock to catch fish. They only get one set of teeth for the rest of there life. The Atlantic Bottle nose dolphin has 80-100 teeth. Dolphins swallow there food whole without chewing it.


Eating

Dolphins do not drink salt water, they get water from the fish and squid they eat. They also swallow their foods whole.

Variety of information about dolphins

Dolphins communicate through sounds, whistles and body movements.
They live in schools / pods up to 12 individuals and the most common dolphin is the bottle nose. The blow hole on top of there head is used for breathing / nostrils. Dolphins predetors are sharks.

Species

There are roughly 42 different species of dolphins found in the world. They're 38 marine and 4 river species. Most dolphins mainly live in saltwater and some live in freshwater.

There are many species of dolphins like:

- Bottle nose Dolphin
- Atlantic Spotted Dolphin
- Dusky Dolphin
- Pacific White Sided Dolphin
- Rough Toothed dolphin
- River Dolphins

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