Ha! Good point. I've never cared for the Ondine stories myself; they always struck me as somehow unwholesome. Prince Pig didn't help matters any.
Did you notice that Rusalka starts out the same way Das Rheingold does? Three otherworldly females tease and flirt with an ugly otherworldly male, whose grasp they manage to evade. Dvorak must have admired more of Wagner than just his music.
Jezibaba was sung by Dolora Zajick, who virtually stole the show as Azucena a season or two ago.