Um, Actually

After the protagonist boarded the oil freighter which is actually Strength, they faced its Stand user, a giant monkey. It is highly intelligent and demonstrate human-like behaviours, such as smoking cigarettes, solving Rubik's cube and lusting over the young girl Anne while she's showering. It was a formidable foe as it is able to phase through the ship and even managed to restrain Jotaro. However, Jotaro managed to defeat it, after freeing himself by provoking it and extended his "Star Finger" to launch a coat button into its head.