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This species is a simple, solitary ascidian, with a tough outer covering or tunic. The body is globular to ovoid in shape, measures 1-2 cm in diameter, and attaches to the substrate at its base. The oral and atrial siphons are positioned anteriorly, well separated, and characterized by tentacle-like processes around the openings (oral siphon 6-lobed; atrial siphon 4-lobed). Overall, the tunic is translucent to greyish-green in color; the surface is sparsely covered with very short hairs that typically remain free of sand grains or debris.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Frey, Melissa

Source: Marine Invaders of the NE Pacific

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