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Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. [2] Ascidians are characterized by a tough outer test or "tunic" made of the polysaccharide cellulose .
Polycarpa aurata, also known as the ox heart ascidian, the gold-mouth sea squirt or the ink-spot sea squirt, is a species of tunicate in the family Styelidae.
Clavelina coerulea, the blue ringed sea squirt, is a species of tunicates belonging to the family Clavelinidae.The species name refers to the vivid blue body coloration. Members of the class Ascidiacea including this species are hermaphroditic; both cross- and self-fertilization is typic
Pycnoclavella diminuta, known as the white-spotted sea squirt, white-spot ascidian, [1] and white-spotted ascidian, [2] is a species of tunicate (sea squirt), in the genus Pycnoclavella. Like all ascidians , these sessile animals are filter feeders .
Ascidiella aspersa, the European sea squirt, is a species of solitary sea squirts native to the northeastern Atlantic, from the Mediterranean Sea to Norway. They possess oval bodies up to 50 to 130 mm (2.0 to 5.1 in) in length. Their branchial (or oral) siphons are conical and positioned at the top of the body. They possess six to eight lobes.
Clavelina lepadiformis, common name the light-bulb sea squirt, is a colonial sea squirt native to the NE Atlantic Ocean. [1] Distribution. Light-bulb sea squirt colony.
Clavelina ("little bottle") is genus of sea squirts (the Ascidiacea), containing the following species: [2] Clavelina amplexa Kott, 2002 Clavelina arafurensis Tokioka, 1952
Ciona savignyi is a marine animal sometimes known as the Pacific transparent sea squirt or solitary sea squirt. It is a species of tunicates in the family Cionidae . It is found in shallow waters around Japan and has spread to the west coast of North America where it is regarded as an invasive species.