Who are the antagonists and protagonists in Flush by Hiaasen?

In "Flush" by Carl Hiaasen, the protagonist is Noah Underwood, a young boy determined to protect the environment and his family. The antagonists are primarily the wealthy and unscrupulous owner of the casino boat, Dusty Muleman, and his associates, who engage in illegal dumping of waste in the ocean. Noah's efforts to expose their wrongdoing drive the story's conflict, highlighting themes of environmentalism and justice.