Diplosoma listerianum (Milne-Edwards, 1841)  

This species is a compound, colonial ascidian, with small, individual zooids embedded in a common matrix or tunic. The colony can grow extensively, forming soft, gelatinous sheets that measure 1-3 mm in thickness and up to several centimeters across. Individual zooids are very small, approximately 1-2 mm. The tunic lacks calcareous spicules, but often possesses white pigment flecks. Often translucent and either colorless or with a gray, light green, or tan hue.