Water animals shark

Sharks are known to be an ancient creature, with fossils from some of the oldest sharks dating back as far as 450 million years. Before they could swim, they were known to crawl on land, eventually merging into the sea in order to move more effectively. Their evolution is one that has led to several species, sizes and structures that are linked to the pre-historic animal.The habitat of sharks not only takes place in different levels of the ocean, but also is restricted to different areas. This is based on the activities that are needed, whether they need fresh or salt water, seasonal changes that are needed and temperature of the ocean. Typically, most sharks will be based around the warmer parts of the ocean, ranging from the central regions of the Americas to places around the tips of Africa, Australia and India. There are also cold water sharks that will be further south or north in the ocean.It has been found that these attacks are not because sharks are typical predators. Typically, they will occur because there is a territorial threat or disturbance that occurs in the sharks inhabited area. At other times, these attacks will be ones that are provoked by humans, causing the shark to try to keep a safe ground. Things such as spear fishing and eco-tourism are contributions to sharks that feel the need to attack. Even among these attacks, it is only certain species that will feel a threat and will respond. Others will simply move into a different territory.Through this predator fish is an evolution that has led to a specific lifestyle with sharks. In every area of the ocean is a type of shark that has moved into their living space, becoming one of the most known ocean dwelling creatures.