Didemnum Molle - The Common Sea Squirt
The common sea squirt has no supporting structures in its adult form, so when it is seen out of water, it resembles a ball of jelly . It is a typical solitary tunicate, whose internal structures are visible through its pale, greenish yellow, gelatinous outer covering, called a test or tunic, which is smooth and translucent. It has two yellow-edged siphons and uses the larger of these to draw in water. nd the smaller, exhaling siphon is used to expel water. Its opening has six lobes. The common sea squirt is very common and is found attached to rocks, reefs, seaweeds, and man-made structures.