Fish

Fish:
Animals are cold-blooded vertebrates that live in
Water, there are many types of fish more than 27,000 type, making it more
Diverse vertebrates. Of fish scales and fins and gill (gill) breathes.

Some fish live in fresh water in lakes, rivers, marshes and some live in salt water in seas and oceans.

Some fish are small and a length of 1 cm or less and some other large and long may
Up to 15 meters in length and weight to 15 tonnes as in the shark and the whale.

More species of fish is a staple food for humans, and fish species that are
More desirable than others, such as carp Carp Cod and cod and herring
Herring and sardines Sardines and Tuna Tuna.

Most species of fish have bones and some other species such as sharks have no bones
It is a real cartilage. Some scientists do not consider it a real fish, but most
People call it fish.

Some other types of animals that live in the sea such as the Star of the Sea
Starfish, jellyfish Jellyfish also called fish but not fish
Does not contain the bones of her body, as well as other type of aquatic organisms known
Organisms such as molluscs with shells of various molluscs, and crustaceans such as there
Shrimp, shrimp and crabs.