"SeaDevil" is the fan-dubbed name of the Ursula/Cruella ship on ABC's Once Upon a Time.
- Cruella and Ursula met at Maleficent's castle, where all three of them are recruited by Rumplestiltskin.
- Together, Cruella, Ursula and Maleficent are collectively known as the Queens of Darkness.
- Cruella and Ursula both fall through a portal to Earth where they part ways, although Rumplestiltskin brings them back together.
- Ursula tells Regina that she and Ursula are "back together", which carries romantic implications but unconfirmed ones.
- Cruella puts a protective/comforting hand on Ursula's back when they see Hook.
- Cruella seems deeply perturbed when Ursula ditches them to be with her father.
- SeaDevil is a non-canon ship; this means that it is not confirmed that they were in any sort of romantic relationship.
- The fact that Cruella formed a relationship of sorts with James confirms that Cruella does not identify as a lesbian.
- Ursula is based on the sea witch from 'The Little Mermaid' and Cruella is based on Cruella De Vil from 'The Hundred and One Dalmatians'.