柳珊瑚目（学名：Gorgonacea）也称海扇，海柳，海鞭，角珊瑚，为珊瑚纲八放珊瑚亚纲的一目。多数种类的群体组成扇形、鞭形或枝状，故名。常见于洋流较强的珊瑚礁区。

柳珊瑚目，全株是一个群体，群体由许多珊瑚虫构成，每个珊瑚虫的口部外围有8只触手，整株群体由中轴骨骼支持。在中轴与珊瑚虫，以及珊瑚虫与珊瑚虫之间由共肉构成。共肉的组成成份除细胞之外，还有骨针，此骨针也可作支持之用。共肉内含有小管，作为珊瑚虫的养分输送管道。

柳珊瑚目中骨针致密，且为钙质的称为硬轴珊瑚亚目(例如：红珊瑚科之贵珊瑚 红/粉/白)，骨针为角质的称为全轴珊瑚亚目(例如：竹珊瑚科之海竹，网柳珊瑚科之海柳)

Alcyonacea is an order of sessile colonial cnidarians found throughout the oceans of the world, especially in the tropics and subtropics. The name "Gorgonacea" is no longer considered valid and Alcyonacea is now the accepted name for the order. Gorgonians are also known as sea whips and sea fans and are similar to the sea pen, a soft coral. Gorgonians are closely related to coral. Individual tiny polyps form colonies that are normally erect, flattened, branching, and reminiscent of a fan. Others may be whiplike, bushy, or even encrusting. A colony can be several feet high and across but only a few inches thick. They may be brightly coloured, often purple, red, or yellow. Photosynthetic gorgonians can be successfully kept in captive reef aquariums.