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This species is a compound, colonial ascidian, with small yet elongated zooids embedded in a firm matrix or tunic. The colony grows to form thick, encrusting slabs that measure more than 4 mm in thickness. Individual zooids are organized into elongated, meandering systems, each separated by a prominent ridge. Zooids are characterized by a pharynx with approximately 18 rows of stigmata. Colonies vary greatly in color, from cream to pale yellow, pink, red, green, or bluish-purple.


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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