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a group of green and white sea anemones on a coral reef in the ocean

Ascidiacea or sea squirts is a class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians ar… | Sea squirt, Underwater world, Animals

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Coral

Ascidiacea or sea squirts is a class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%. Sea squirts are sessile animals: they remain firmly attached tosubstratum, such as rocks and shells. Sea squirts are rounded or cylindrical animals ranging from about 0.5 to 10 cm (0.2 to 4 in) in size. One end of the body is always firmly fixed to rock, coral, or some similar solid surface.

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