Are tunicates / sea squirts (Phylum Urochordata) bilaterally symmetrical?

Question

Please answer only if you KNOW for sure.

Answer 1

Subphylum Urochordata. The common organisms are called tunicates. Most are sessile marine organisms. The organism has a body plan similar to that of a clam. Water is drawn into the body through an incurrent siphon; food particles are filtered out through the mucus covered gill slits. The food then moves into the intestine and the waste material is then passed out through the excurrent siphon. The adults lose 3 of the chordate characteristics as adults: Notochord, nerve chord , and tail. Even though they look like they do not have bilateral symmetry they do. There is a definite ventral, dorsal, and lateral areas.

Answer 2

Yes, they are. Although they do have an irregularly shaped outer membrane, the differentiation of cells on both sides of the body is the same.

Answer 3

yes