Sabrina: The Animated Series (1999)

S1E57 Fish Schtick

During 'cliche week,' every cliché uttered by a witch materializes. When Sabrina feels envious of a new girl and wishes to "swim like a fish," she magically transforms into one! With time running out, Salem steps in to assist her, taking her to the mall in search of Hilda and Zelda. Together, they must devise a plan to reverse the spell before Sabrina finds herself stuck in fish form indefinitely!