I'm for the Hippopotamus

In 1950, in Africa, Tom runs safaris for tourists, secretly providing them with guns loaded with blanks. Conflict arises when Slim, Tom’s cousin—a laid-back slacker and committed environmentalist—arrives. The two cousins clash with Jack Ormond, a local animal trafficker. A doctor, who is also a friend of the duo, publicly denounces Ormond’s mistreatment of animals in a newspaper article, prompting Ormond to retaliate by sending his henchmen to destroy the doctor’s clinic. However, at the clinic, Ormond’s men encounter Tom and Slim, who are waiting for them. In a swift confrontation, the two cousins overpower and defeat the henchmen in a fight. Enraged, Ormond attempts to bribe the cousins, and when this fails, he has them falsely imprisoned for a theft they did not commit. After escaping from prison, the two men make their way to Ormond’s ship, where they confront and overwhelm the merchant’s men.