When a band of rowdy, drunk pirates captures a mermaid, various inhabitants of the ocean wage war against the plunderers. Initially sidelined by a ship's anchor, giant sea royal King Neptune breaks free and puts and end to the fighting.
The Indian in the Cupboard was one of the 'classic movies. My youngest child liked it so much my dad made her a "cupboard" for her Indian, when we bought the movie (it was included with the VHS). She even had an old skeleton key to open the cupboard.