Description
The first observation of the sea squirt in the Oosterschelde dates from the year 1991 and was then called Didemnum lahillei. Recent DNA research has shown that a number of species in various parts of the world, are in fact all one and the same species; D. vexillum. Today it can't only be found in the Oosterschelde, but also in the Grevelingen. This colonial ascidian looks a bit like a sponge, due to the closely arranged inhalant openings. The colonies share common exhalant openings. The Dutch name refers to it's dripping appearance in steeply sloping habitats.

Size
It can cover tens of square centimeters of surface, and is several millimeters thick.

Colour
The coulor is usually white-yellow to beige.

Habitat
Sub tidal, often covering other organisms.

Distribution
Global.