Snellie is a female sea snail who has a lavender shell with a purple swirl on it. She also has a large pink bow tie on the top of her shell. Her eyes have blue irises with black pupils and long, girly eyelashes.
She appears in the episode "The Great Snail Race," where she races against Gary and Rocky. Squidward keeps Snellie away from Gary because of his hatred of him and SpongeBob.
After Gary is pushed too hard by SpongeBob, Snellie goes back to him instead of finishing the race to see if he is okay. In the end, Gary and Snellie seem to have fallen in love with each other and go off the track together. Even though they fell in love, Snellie has not been shown with Gary in any other episodes.
Snellie's snail carrier is a collectible item in the video game SpongeBob's Truth or Square. When it is viewed in the hub, Snellie's eyes poke out, along with her meowing, before they see each other and go back into the carrier. In the DS version, Snellie herself replaces the item.
Her name may be derived from the Dutch word "Snel," which translates to "Fast" in English.