* The shark is a marine animal from the cartilaginous fish belonging to the mammalian class that lives in most seas and oceans around the world, and is the second strongest marine creature after the white whale, as field studies and coastal fossils have confirmed the existence of the shark since four hundred million years ago, and this made it one of the oldest organisms on Earth  Even older than dinosaurs,

 * The number of shark subspecies is estimated at more than two thousand species, more than half of them became completely extinct, and the rest of them differ from each other in terms of shape, food, and reproduction.  Shark teeth The shark is distinguished by its strong jaws, and this is what makes it different from all other marine organisms, and each type has teeth that differ from the teeth of other species, depending on the type of strain to which it belongs, knowing that the shark is able to replace the teeth that it loses continuously  ,

 * As soon as a tooth falls out, another straight tooth grows.  Because the shark is a predator, we find it has a row of sharp and pointed teeth, which can tear its victim to pieces in a few minutes, as it moves its upper and lower jaws together in sync with its head so that it can completely swallow its prey.

 * The number of shark teeth is three thousand molars, distributed in five rows of the front and back teeth in its mouth, and they fold in easily like the claws of a cat, so that when the viewer of his teeth folds he thinks that he was created without teeth.  Morphological features: The shark has a massive streamlined body that ends with flat cartilaginous fins that help it swim,

 * It does not have a skeleton like other fish, but rather a cartilaginous skeleton that enables it to swim left and right with great flexibility.  The length of the shark is about twelve meters, and its flat fins reach a length of six meters, and are considered as the limbs that enable it to move and move quickly from one place to another, and it has a strong sense that helps it track the movement of its prey called the electrical reception sense.

 * With it, he is able to perceive the natural electrical stimuli around him due to the vibrations that the prey cause in the water, so when the prey moves, this movement produces an electrical charge that the shark feels, and makes it head to it quickly towards it to pounce on it.  Despite the power of the shark and the amount of terror that it spreads when talking about it, it is prey like other large fish, as it is capable of both: the blue whale and the killer whale.