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Any sessile tunicate of the class Ascidiacea, which expels water from two openings when disturbed; they are filter feeders.

Ciona intestinalis, commonly known as the vase tunicate or as a sea squirt

Any sessile tunicate of the class Ascidiacea, which expels water from two openings when disturbed; they are filter feeders.

The colorful Polycarpa aurata sits in a bed of white bryozoans (Triphyllozoon inornatum).

Any sessile tunicate of the class Ascidiacea, which expels water from two openings when disturbed; they are filter feeders.

A tunicate group from East Timor