All of this barbarism occurs for just one reason; shark fin soup. Shark fin soup is considered a delicacy in Asian countries, and purported to contain magical properties. The only magical properties this tasteless soup contains, is in the marketing. Customers are willing to pay anywhere from $50 to $400 for a bowl of this soup, for which around 90 sharks had to suffocate to death for.
Shark fin soup can therefore cause neurological problems for the unwitting customers that order it. That is, assuming you have ordered real shark fin soup. Unsurprisingly, with the amount of money involved, much of the shark fin soup being offered on the wholesale market is fake.

Infographic by: www.nothingfishy.co