"Néréide (Sea Nymph)" by Jean-Baptiste Auguste Clésinger is a marble sculpture depicting a mythological sea nymph carved from white marble and mounted on a contrasting veined green marble base. The work exemplifies mid-19th century Neoclassical sculpture, showcasing Clésinger's technical mastery in rendering the idealized female form with graceful movement and refined detail. The choice of complementary marble materials enhances the sculpture's visual sophistication and emphasizes the ethereal quality of the mythological subject.