Great white shark, Carcharodon carcharias, with mouth tumour. One of the reasons millions of sharks get killed each year is the popular belief

- Image ID: KD8XD1
Paulo Oliveira / Alamy Stock Photo
Image ID: KD8XD1
that sharks don't get tumors, or cancer. That, along with the demand for shark fins, are the major reasons sharks get slaughtered. The belief that sharks don't get cancer has led to a big demand for their cartilage, which is supposed to prevent, or cure cancer. It's just not true. Sharks get cancer as you can see in this white shark on South Africa coast. So, if you are taking shark cartilage supplements to prevent cancer, you might want to save your money and a shark. South Africa