…a free-swimming marine invertebrate related to the sea squirts with a transparent, barrel-shaped body…
…a marine tunicate that has a baglike body with orifices through which water flows into and out of a central pharynx…
…a marine invertebrate of a group that includes the sea squirts and salps. They have a rubbery or hard outer coat and two siphons to draw water into and out of the body…
