Page "Ascidiacea" Paragraph 18

Almost all ascidians are hermaphrodites and conspicuous mature ascidians are sessile.

The gonads are located in the abdomen or postabdomen, and include one testis and one ovary, each of which opens via a duct into the cloaca.

Broadly speaking, the ascidians can be divided into species which exist as independent animals ( the solitary ascidians ) and those which are interdependent ( the colonial ascidians ).

Different species of ascidians can have markedly different reproductive strategies, with colonial forms having mixed modes of reproduction.