About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 26. Chapters: Ascidiacea, Tunicate, Salp, Ciona intestinalis, Botryllus schlosseri, Pyrosome, Pycnoclavela diminuta, Pyura, Larvacea, Doliolida, Styela clava, Thaliacea, Corella willmeriana, Sea pineapple, Didemnum, Clavelina, Clavelina moluccensis, Botrylloides violaceus, Didemnins, Pleurogona, Oikopleura, Microcosmus sabatieri, Herdmania momus, Clavelina robusta, Pyura stolonifera, Clavelina picta, Predatory tunicate, Halocynthia papillosa, Hemovanadin, Clavelina sabbadini, Pyura spinifera, Styela plicata, Aplousobranchia, Sea peach, Sorberacea, Molgula, Phlebobranchia, Botrylloides leachi, Didemnidae, Clavelinidae, Clavelina lepadiformis, Pyura praeputialis, Pyuridae, Stolidobranchia, Polyclinidae, Ascidiidae, Enterogona, Eusynstyela misakiensis, Nephtheis fascicularis, Cionidae, Yarnemia, Agnesiidae, Diazonidae, Doliolum, Hexacrobylidae, Cheungkongella, Archidistoma. Excerpt: Ascidiacea (commonly known as the ascidians or sea squirts) is a class in the Urochordata subphylum of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of the polysaccharide tunicin, as compared to other tunicates which are less rigid. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%. While members of the Thaliacea and Larvacea swim freely like plankton, sea squirts are sessile animals: they remain firmly attached to substratum such as rocks and shells. There are 2,300 species of ascidians and three main types: solitary ascidians, social ascidians that form clumped communities by attaching at their bases, and compound ascidians that consist of many small individuals (each individual is called a zooid) forming colonies up to several meters in diameter. Sea squirts feed by taking in water through the oral siphon. The water enters the mouth and pharynx, flows thr...
