Colonial Botryllus schlosseri is similar in appearance to other colonial tunicates such as those belonging to the genus Botrylloides.
Combined effects of temperature and salinity on colonies of Botryllus schlosseri and Botrylloides leachi (Ascidiacea) from the Venetian Lagoon.
schlosseri colonies grew exponentially as juveniles attaining colony sizes of up to 1400 zooids within 69 days (Chadwick-Furman and Weissman 1995).
Each system is comprised of approximately 20 oval- to tear-shaped zooids.
Color is variable but all zooids within a colony are the same color.
The star tunicate, Botryllus schlosseri is a colonial tunicate not native to the U.
Colonies grow in flat sheets or lobes on hard substrata and are composed of many (hundreds to thousands) clonal, asexually produced zooids arranged in approximately star- or flower-shaped clusters called systems.
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