What Kind of Creatures are Sharks?
Sharks can be found in every ocean of the world. To many people, there’s only one kind of shark: the man-eating white shark of the movie Jaws. They think sharks are ruthless predators that attack anything they come across. Sharks are sometimes thought of as primitive creatures as they have been in existence for million of years. In fact, sharks are very intelligent. They have a fantastic sense of smell and hearing as well as good vision in low light conditions. Their sense of smell is so acute that they can detect a drop of blood dissolved in over one million gallons of water! And they can hear can detect a struggling fish over two kilometres away. Sharks do not have external ears. They detect sound with the help of their lateral line system which consists of hundreds of pores along the side of the shark’s body. These pores are highly sensitive to wave movements, pressure changes and vibrations in the water. There are approximately 350 species of sharks. All sharks are boneless fishes
