Flotsam and Jetsam

Flotsam and Jetsam are the moray eel minions of the sea witch Ursula.

Origin
Flotsam and Jetsam are voiced by the late Paddi Edwards in the film and the television series. They speak in unison, finish each other's sentences, and entwine their bodies. The concept of their linkage is further heightened when their white eyes combine to form a single crystal ball, a portal through which Ursula can view the outside world. Ursula would remain in her lair, working from behind the scenes, and watching everything from the crystal ball.

The eels serve as Ursula's minions and spies, often sneaking around Atlantica, spotting out Ursula's next potential victim. They are excessively beloved by Ursula who refers to them as her own children. They are also incredibly intelligent and known to complete any of Ursula's tasks with complete success. Unlike most Disney Villain henchman who are portrayed as rather comical and bubbly compared to their boss, Flotsam and Jetsam are portrayed as dark and mysterious lackeys, matching well with Ursula's wickedness.

The Little Mermaid
Flotsam and Jetsam are the first to notice Ariel's infatuation with the world above. Upon witnessing the mermaid fall in love with a human, Prince Eric, Ursula sends Flotsam and Jetsam to propose a deal to Ariel. In making sure that Ursula wins the deal, Flotsam and Jetsam sabotage what would have been a successful kiss between Ariel and Eric. In the climax, Flotsam and Jetsam are accidentally killed by the trident when Ariel grabs Ursula's hair just as the sea witch fires a killing shot intended for Eric. Flotsam and Jetsam are notable for their efficiency (which is something not to take lightly- usually- especially in Disney movies, the henchmen, are clumsy and botch up every plan). Until they were killed, they succeeded at every task Ursula gave them, and due to that, Ursula, shocked that she killed her eels, sadly mourns for them, right before turning her attention and rage towards Ariel and Eric.

In an original draft for the ending, they also tried to capture Ariel when she tried to escape, and when Ursula killed them, she barely seemed to notice.

The Little Mermaid (TV series)
The eels appear in a few episodes of the television series, whenever Ursula makes an appearance. Unlike the film, where Ursula is affectionate and loving, in the television series Ursula is hostile towards the eels, often scolding and berating them.

Role in Ultima
In Ultima, Flotsam and Jetsam were resurrected by Maleficent right after she revived Ursula from the darkness. The two eels are currently servants of the Organization, and continue to serve Ursula as her spies against the Society and as her bodyguards in times of battle.