Abigail is an aqua-blue female fish who maker several cameo appearances throughout the series, starting with the episode "Ripped Pants."
Abigail is an aqua-blue fish with light teal lips and a light aqua-green dorsal fin and legs.
She wears a purple dress and black shoes. Her appearance is very similar to Martha Smith, the only differences being her lips, fin, the shape of her head, and her shoe color.
Abigail is currently married to Nat Peterson and is shown in numerous episodes with him, such as "Idiot Box."