Sea whip is a common name for several species of marine invertebrates that belong to the order Gorgonacea. These creatures are characterized by a branching, tree-like structure covered in small polyps that are capable of retracting their tentacles. While there are many different types of sea whips, they are generally referred to as gorgonians or sea fans. Other synonyms for sea whip include octocoral, soft coral, and horny coral. These names reflect the fact that sea whips are not true corals but rather belong to a separate group of colonial organisms known as octocorals. Overall, sea whips are important members of marine ecosystems, providing food and habitat for a variety of sea creatures.