The Oceanides (Finnish title: , translated to English as "Nymphs of the Waves" or "Spirits of the Waves"; original working title " "; in English, "Rondo of the Waves"), Op. 73, is a single-movement tone poem for orchestra written in by the Finnish composer Jean Sibelius. The piece, which refers to the nymphs in Greek mythology who inhabited the Mediterranean Sea, premiered on 4 June 1914 at the Norfolk Music Festival in Connecticut with Sibelius conducting. Praised upon its premiere as "the finest evocation of the sea ... ever ... produced in music", the tone poem, in D major, consists of two subjects, said to represent the playful activity of the nymphs and the majesty of the ocean, respectively. Sibelius gradually develops this material over three informal stages: first, a placid ocean; second, a gathering storm; and third, a thunderous wave-crash climax. As the tempest subsides, a final chord sounds, symbolizing the mighty power and limitless expanse of the sea.