موضوع عن سمك القرش بالانجليزي

موضوع عن سمك القرش بالانجليزي

يعتبر سمك القرش من اكثر الكائنات البحرية غموضا والتي قام بدراسة سلوكها العديد من الباحثين والدارسين الا انها لاتزال لغزا كبيرا يستحق الدراسة والبحث, وهنا سنتعرف على العديد من المعلومات عن حياة سمك القرش في موضوع عن سمك القرش بالانجليزي.

Sharks

 Sharks have more than 400 species, varying in size from 20.32 centimeters to 12.19 meters. The shark is one of the fiercest predators with strong senses of hearing, smell and vision,  Where the sense of smell to detect the smell of prey from a distance, and makes it see clearly in the dim light of the depth of the ocean.

Sharks feed on meat, large animals such as seals, small plankton or krill, fish including sharks. It is worth noting that the history of the sharks dates back more than hundreds of millions of years.

Characteristics of Shark Body

Unlike most skeletons in fish made up of bones, the structure of shark skeleton consists of cartilage, a flexible solid material consisting the nose and ear of the human. Cartilage is much lighter than bone, giving sharks the ability to swim long distances with less energy.

The shark has several rows of teeth in its jaw, and the number of teeth is not fixed;  Where the shark is dropping its teeth and replacing it with new teeth.

The number of teeth replaced by the shark reached to thousands of teeth. The shark also has several gills, unlike bone fish that have a single gizzard on both sides of the body.

Shark Behavior

Most types of sharks are active in the evening to get food. Some species migrate large distances to feed and multiply.

There are species that live alone and others live in groups. There are types of sharks attack and surprise their prey like the Great White Shark, and other species fed by opening their mouth wide to capture the largest amount of plankton and krill like a whale shark.

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