Flotsam and Jetsam are Ursula's green moray eel minions, voiced by Paddi Edwards in the 1989 film. They do Ursula's bidding and act as her spies, keeping their eye on the events unfolding in and around Atlantica. They are tasked with following Ariel and reporting her actions back to Ursula. They eventually manipulate Ariel into visiting Ursula in order to gain human legs. They are ultimately killed in the film's climax when Ursula accidentally destroys them with King Triton's trident after Ariel sabotages Ursula's attempt to kill Eric. Out of remorse for killing her minions, Ursula mourns for them before turning her rage towards Ariel and Eric.
Flotsam and Jetsam appear in the prequel television series alongside Ursula. They also appear in the Broadway stage musical, where the roles were originated by Tyler Maynard and Derrick Baskin.