Family Salpidae refers to a group of marine invertebrates that belong to the Tunicata class. These creatures have a transparent barrel-shaped body and swim freely in the ocean. They are also commonly known as Salps, which are planktonic tunicates that feed on other planktonic organisms. Other synonyms for Family Salpidae include Salpae, Salpians, and Salpiformes. They are important in the marine ecosystem as they are a source of food for other marine species such as whales, fish, and birds. Salps play a vital role in the ocean's food web by helping to convert carbon dioxide into organic molecules, thereby reducing the amount of CO2 in the atmosphere.