一夜鱼龙舞

From 辛弃疾《青玉案·元夕》 (Xin Qiji, 'Qing Yu An: Lantern Festival,' Southern Song, late 12th c.): 东风夜放花千树，更吹落，星如雨。宝马雕车香满路，凤箫声动，玉壶光转，一夜鱼龙舞 (East wind on the night unlooses a thousand trees of flowers, then shakes them down like stars in rain. Fine horses and carved carriages crowd the fragrant streets; phoenix flutes sound, jade-jar lamps turn, all night the fish and dragons dance). The poem ends with 蓦然回首，那人却在，灯火阑珊处 - one of the most famous lines in all Chinese literature.

鱼龙 = fish-and-dragon lanterns carried in the Lantern Festival parade. Quoted to evoke the Lantern Festival (元宵) or any dazzling night scene. Paired with the earlier 凤箫声动，玉壶光转 in the original.