
Ursula is based on the "sea witch" character in Hans Christian Andersen's story " The Little Mermaid". Ursula is aided by her two moray eels, Flotsam and Jetsam, whom she refers to as her "babies". From her secluded lair, she awaits the chance to get her revenge on Triton and become Queen of Atlantica by stealing the king's trident, an extremely powerful weapon that grants its user control over the seas and its foils. Ursula laments her distaste for her living conditions, despite having maintained all of her powerful black magic. These polyps were merfolk who had previously gone to Ursula for help but found themselves unable to fulfill their side of the bargain, leading Ursula to claim them as her own and adding them to her collection. By orders of the King, Ursula was exiled from Atlantica and made her home in the remains of a leviathan lined with a garden of writhing polyps.

Ursula's greed and use of dark magic led to her banishment. She was widely known as the "Sea Witch", an alias she accepted in stride. She boasts that her previous life was lavish and included such spoils as "fantastical feasts." Power-hungry and devilish, even in the past, Ursula garnered a disreputable reputation amongst underwater dwellers. She states through a monologue that she once lived in the royal palace of King Triton, the king of the underwater city of Atlantica. Ursula belongs to a race of creatures known as Cecaelia, which are half-woman, half-octopus.

Ursula (also known as the Sea Witch) is the main antagonist of Disney's 1989 animated feature film The Little Mermaid. they weren't kidding when they called me, well, a witch.” ―Ursula “ I admit that in the past I've been a nasty.
