Molgula citrina Alder & Hancock, 1848  

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.