The Little Mermaid - Season 1 - Eps 11: Red
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.
About The Little Mermaid

Title: The Little Mermaid
First Air Date: 1992-09-11
Last Air Date: 1994-11-25
Status: Ended
Rating: 7/10 (from 703 votes)
Language: EN
Seasons: 3
Total Episodes: 31
Network: CBS
Genres: Family, Animation, Kids, Sci-Fi & Fantasy
Production Companies: Walt Disney Television, Disney Television Animation
Synopsis
Disney's The Little Mermaid is an American animated television series produced by Walt Disney Television Animation based on the 1989 Disney film of the same name. It features the adventures of Ariel as a mermaid prior to the events of the film. This series is the first Disney television series to be spun off from a major animated film. Some of the voice actors of the film reprise their roles in the series, among them Jodi Benson as Ariel, Samuel E. Wright as Sebastian, Kenneth Mars as King Triton, and Pat Carroll as Ursula.
Cast

Jodi Benson
Ariel (voice)

Jim Cummings
Ebb & Emporer Sharga (voice)

Samuel E. Wright
Sebastian (voice)

Kenneth Mars
King Triton (voice)

Danny Cooksey
Urchin (voice)

Mary Kay Bergman
Arista (voice)

Maurice LaMarche
Scuttle (voice)

Edan Gross
Flounder (Voice)