Shark soup uses the fins of shark fins, also called shark fins. Shark's fin shark is a kind of shark with shallow water depth, which is mainly distributed in tropical and subtropical waters. The gill slits on the back of its fins are long and sharp, which is more suitable for shark fin soup. However, in order to get more shark fins, some fishermen will throw the sharks with their fins cut directly into the sea, which will not only lead to the decrease of shark population, but also cause great harm to the ecological environment. So many people advocate boycotting seafood such as shark fin soup, which is controversial in morality and environmental protection.