Sharks do not have a single bone in the body. Their backbone consists of cartilages.
Almost all sharks move their whole life. Movement for sharks is life, water passes through their gills, supplying oxygen to the blood. If the shark stops, then it suffocates and dies.
Sharks have very good hearing. They can hear fish noise at a distance of 500 meters.
If the shark is placed in a large pool. She will even smell a drop of blood in this pool.
Most sharks do not reach a meter in length, but there are exceptions, such as the tiger shark, they can reach up to 14 meters in length.
Newborn sharks are already able to worry about themselves. The mother of the shark leaves the baby behind her back, so as not to eat it.
Not all kinds of sharks are viviparous. Some lay eggs, and hatched, the young themselves take care of themselves.
Big white sharks are the most dangerous sharks in the ocean. These predators can develop a speed in the water up to 30 km / h.
Unlike other types of sharks, large white sharks are warm-blooded. Such sharks should eat a lot of meat to regulate their temperature.
A shark always has a small row of teeth that develops behind a series of large teeth. Over time, small teeth move forward, and the front teeth fall out.
Sharks do not have a single bone in the body. Their backbone consists of cartilages.
