Ciona fascicularis Ciona gelatinosa Ciona imperfecta Ciona intestinalis Ciona mollis Ciona is a genus of Cionidae sea squirts. The body of Ciona is bag-like and covered by a tunic, which is a secretion of the epidermal cells. The body is attached at a permanent base located at the posterior part, and the opposite bears two openings, the buccal (or...