Some Animals Live in Water

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About two-thirds of the Earth is covered with water. This is home for many of the Earth's creatures. Many different kinds of animals live in water. Most people are familiar with fish living in water. Other animals that live in water include: amphibians, cnidaria, crustaceans, echinoderms, mollusks and even some mammals and reptiles.

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School of Fish

A wide variety of fish live in the sea. Many types of fish live in fresh water like rivers and lakes. Other types of fish live in the salt water of the oceans and seas.

The water is not only the fishes' home, but it also provides them with the food and oxygen they need to live.


Crabs and Lobsters

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Crabs and lobsters live mostly in the ocean or other waters.



Sea Ray

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Sea Ray
Sea Ray

Sea rays fly through the water like birds through air. The biggest rays are the manta rays. Some kinds of mantas can grow to over 20 feet from tip to tip, and can weigh more than 3000 pounds.



Whales and Dolphins

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Although whales and dolphins live in water, they are mammals. They cannot breathe under water. They must come to the surface to breathe air. They breathe through a blowhole, or nostrils, on the top of their head. Babies are born under water, but must be pushed to the surface by the mother so the bady can take a breath.

The circulatory and respiratory systems have adapted to living in water. Whales and dolphins can dive deep in the water on a single breath.


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