Symplegma reptans (Oka, 1927)  

This species is a compound, colonial ascidian, with small, flattened zooids embedded in a common matrix or tunic. The colony grows to form a thin, flat mat that can reach 30 cm in diameter, sometimes forming lobes. Individual zooids are oblong in shape, and measure 2-4 mm in length. Each zooid is independent, possessing its own atrial siphon that opens at the surface of the tunic. Zooids are randomly arranged. Tunic is clear and transparent.