The atrial siphons are located at the upper third of the side of the body and possess six lobes.

The body is covered by a firm transparent test that is greyish to brown in color.

Both the openings of the branchial and atrial siphons possess lighter colored ridges on their rims.

They can be found in dense groups of unfused individuals on hard surfaces like rocks.

[2][3][4][5] Ascidiella aspersa closely resemble Ciona intestinalis, but can be distinguished by their lack of yellow markings around their siphons.