around 440 known species of sharks and out of those species one of the very few species that can live long periods of time in fresh water is the bull shark. While scientists have learned how these creatures survive in fresh water, it is less clear why bull sharks have developed this amazing ability. Bull sharks go where the food is, so an idea to this adaption of freshwater tolerance could be associated with competition for salt water food resources. Although some sharks occasionally swim into areas
them is sharks. Because of its aggressive behavior and the ability to live in many water environments, bull sharks are considered as one of the most dangerous animasl to human. The bull sharks’ scientific name is Carcharhinus leucas; it belongs to the Carcharhinidae family, which a branch of Carcharhiniformes order. Bull sharks are mostly distributed among the coastal water of tropical and subtropical around the world as well as river systems and some lakes where the majority of sharks can't survive