Follow me to my Secret Grotto
After the huge success Disney had with "The Little Mermaid", they decided the movie needed a prequel series for TV. "The Little Mermaid" Series debuted on CBS in 1992 and ran for three seasons. The episodes were based on Ariel's life and her adventures about a year before the original movie.

Each episode was a new adventure for Ariel, Sebastian, Flounder and even some new friends like Urchin. There are some episodes where Ursula appears in her lair, Prince Eric and company on land and even a cameo of Hans Christian Andersen!

Most of the characters from the movie appear in the series such as King Triton and Ariel's Sisters: Attina, Aquatta, Andrina, Arista, Alana and Adella along with new original characters.
Whale of a Tale
The Great Sebastian
Stormy
Urchin
Double Bubble
Message in a Bottle
Charmed
Marriage of Inconvenience
The Evil Manta
Thingamajigger
Red
Beached
Trident True
Eel-Ectric City
Season 1 (1992)
Scuttle
KingCrab
Island of Fear
Land of the Dinosaurs
Heroes
The Beast Within
Ariel's Treasures
A Little Evil
Season 3 (1994)
Resigned to It
Calliope Dreams
Save the Whale
Against the Tide
Giggles
Wish upon a Starfish
Tail of Two Crabs
Metal Fish
T'ank You for Dat, Ariel
Season 2 (1993)
Here's the list of the episodes from each season. Click on the link for some screenshots
Here are a few screenshots from the series intro:
Original characters from the series

Spot
Urchin
The Lobster Mobster
The Shrimp
The Evil Manta
Pearl
Stormy
Here're some scenes from the series.
Flounder, Ariel and Spot
King Triton, Ariel and Flounder
Princess Ariel
Ariel and Sebastian
Ariel and Atlantica
Flounder, Ariel and Urchin
Ursula, Flotsam & Jetsam