The Little Mermaid

Red (1x11)

Air date: Nov 14, 1992

After Ariel's party King Triton feels that he's too old, so his glowing glowfish gets Triton a magical age stone that turns Triton into a little boy called Red. Later on Ariel and Sebastian find out and they trace the jewel to a magic sorcess who only old King Triton can beat.