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Classification of animals

Grade　　　　　Class　　　 　　No　 　 Name

Vertebrate：Animals with a spine.

①Fishes（フィッシュ）
Fish mate.
For example：CARP , Eel , Puffer fish , angler , Seahorse , Tuna , Ocean Sunfish , Shark , Ray fish　
・The biggest fish is whale shark.（14m）
・Most species of life in water.
・Marine fish and Freshwater fish , Bony fish and Cartilaginous fish（Shark , Ray fish）
・Body is covered with scales.
　Exception：Several species of deep sea fish.
・The breathing with gills.
　Exception：Lung fish（They dry up the water in the lungs to breathe.）
・Most species lays eggs（without shell） in water.
・Poikilotherm：A poikilotherm is an animal whose internal temperature varies considerably.

②Amphibians（アンフィビアン）
Frog mate.
For example：frog , Newt , Salamander
・The biggest amphibians is Japanese giant salamander.（1.5m）
・Can't live only in fresh water.（cannot cross the sea.）
・There are two types , Anura（No tail）and Caudata（Has tail）
・The body is covered with damp skin.（It is very vulnerable to drying.）
・metamorphosis：A Gill-breathing when I was a child, but adults breathe with their lungs.
・Most species lays eggs（without shell） in water.
・Poikilotherm

③Reptiles（ラプタイル）
Lizard mate.
For example：Lizard , snake , Turtle , Crocodile , Gecko
・The biggest amphibians is
Saltwater crocodile.（8.5m）
or Python reticulatus（９m）
・It is very resistant to dryness. Reptiles can live in the desert.
・Body is covered with thick scales. Turtle shell comes to the ribs.
・Breathe with their lungs.
・Lays eggs on land covered with a hard shell.
・Poikilotherm

④Birds（バード）
Bird mate.
For example：Pigeons , Crow , Ostrich , Penguin
・The biggest birds is ostrich.（2.7m）Does not all birds fly.
・It is very resistant to dryness. The birds evolved from dinosaurs.
・Birds are flying in the sky, across the sea. Birds are everywhere in the world.
・Body is covered with Feather.
・Breathe with their lungs.
・Make a nest on a tree, and lays eggs.（Hard shell eggs）
・homeotherm：Warm-blooded animal species can maintain a body temperature higher than their environment.

⑤Mammals（マンマル）
Females of all mammal species nurse their young with milk, secreted from the mammary glands.
For example：Rabbits, Lions, zebras, whales, bats, Platypus
・The biggest Mammals is blue whale.（30m）
・Mammals did diversify after the age of the dinosaurs.
・The body is covered with hair.
・Breathe with their lungs.
・Fetal
　Exception：Platypus and Echidna lays eggs.
・homeotherm