Originally, the Jungle Cruise was designed to be a vaguely educational sort of attraction, with guests learning about the different major rivers of the world and the animals that inhabit them. However, since the early 1960s, the attraction has evolved, and today it’s much better known for the jokes spouted by the various skippers.
Article source: https://www.cinemablend.com/news/2482216/9-more-hilarious-jungle-cruise-jokes-we-need-to-hear-in-the-movie