The ocean is one of the most valuable things in the world. The World Wildlife Fund states that if the ocean were a nation, it would rank seventh compared to the world’s top ten economies. They have estimated that the total value of the ocean reaches up to $24 trillion. As it helps provide food, jobs, and medicine, everyone will be affected if it is destroyed. (Ocean wealth) However, at the moment, humans are the ones destroying it. Human activities such as fishing, coastal development and urbanisation have been threatening the ocean for decades, affecting many marine species such as sharks, turtles, and even plankton .People cannot just keep taking from the oceans. It is time to give something in return. One really important marine animal that is threatened by human activities is the shark. According to the Sea Shepherd Conservation Society, sharks are some of the main predators in the ocean and have been around for more than 400 million years. They are vital to the planet because they help keep the ecosystem balanced by getting rid of animals that are diseased or have genetic defects. This helps stabilize fish populations. (Humans kill) Many countries such as the Bahamas rely heavily on sharks for tourism. According to the Bahamas Diving Association, in the past 20 years shark tourism has made about $800 million for the country. (Guy Harvey) Without the sharks, the income of countries would decline massively and whole marine ecosystems could be affected. There are several