Tarzan and the Mermaid (1964)

Having spent decades searching for her missing only son, the queen has finally lost hope. However, the boy is alive, rescued by the compassionate wild animals of the forest, and has grown into mighty Tarzan, the lord of the jungle. As one thing leads to another, Tarzan reunites with his beloved mother; nevertheless, this otherwise joyous event doesn't sit well with the kingdom's wicked prime minister, who thirsts for power and dreams of usurping the throne. Now, Tarzan and the queen are in grave danger, and if it weren't for a kind-hearted mermaid, they would meet their end by a horrible beast. Can Tarzan thwart the sinister plans of the evil tyrant to restore peace and stability?