There isn't a specific historical or cultural references to a civilization that worshipped sharks with exactly nine shark gods. However, shark worship and reverence for marine creatures have been present in various cultures throughout history.
One culture that holds sharks in high regard is the Pacific Islander culture, particularly in areas such as Hawaii, Fiji, and Samoa. In these cultures, sharks are often seen as powerful and respected creatures. They are sometimes considered guardians or ancestors, and their protection is sought by fisherman and seafarers.