* About 50 million years since the appearance of fish species.* The number of fish greater than the number of other species of vertebrate.
* Fish in cold blood animals. The heat of the body, where they will change depending on water temperature.
* Almost all of the fish have been tutuppukalaip. They used nintuvatarkup. As well as helping to protect the health of fish scales.
* About 22 thousand varieties of fish found there. Is different for each type of fish are smaller in size and in color.
* There is usually a lung fish. The gills of the fish through the mouth with water, drink kannattil release. Bring the water to take in carbon dioxide and release oxygen.
* Tunkukinrana fish with open eyes. Because these do not have eyelids. Deep-sea fish sleep.
* There externalear fish. At the same time, you will have exactly shocks are realized.
* Forest, taking oil from fish such as shark. Food and bones and scales are used as fertilizer.
* Smallest Fish Kobe. This dose will be 13 mm. The largest fish, the whale shark. It is 18 meters in length.
* Lung fish the fish to breathe through lungs.
* In deep-sea fish species emit light.
* Flying fish can reach a far jump.
* The speed of the fish carried the word
* Clean the fish's mouth when the body can 'Glee' fish.
* 'Buffer Fish "will be flat. The sight of the enemy உருண்டையாகிவிடும் drinking water. The enemy saw them running scared!
* "Sun fish" in the hundreds of millions of fish lay eggs.
* Surgeon fish, the fish on both sides of the area, such as the system has a small knife.
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