Elemental, My Dear Jasmine Aladdin : Season 1 Episode 34

The gang laughs when Princess Jasmine is swept over by a wave, but the next one drags her into a vortex, down to a magically sealed sea section, the domain of mermaid-witch Saleen. It takes a while until even Genie works out she's using magic against them, desiring Aladdin for herself. Then the gang must save Jasmine.