Sadie is a light yellow butterfly tang fish with blue fins. Like Mable-Monica, she has appeared with Fred and Tom and makes many cameo appearances throughout the show.
Sadie is a light yellow female fish with light olive-green lips, and has black eyes and light faded blue fins. She has blue hands and legs. She wears a floral-printed dress that is colored white and red.
Sadie is the ex-wife of Tom and they have been shown together in numerous episodes such as "Fear of a Krabby Patty." In "Evil Spatula," it is revealed that she and Tom are the parents of a purple daughter and possibly a green baby. Sadie is also the ex-wife of Nat Peterson and they have been shown together in many episodes such as "Goo Goo Gas."