orange form with open siphons
(as per "Beachcomber's Guide to Seashore Life of California" p. 212)
Washed up on the rocks. Maybe still alive a bit, squirted something out of a hole while I was holding it.
Ascidiacea (commonly known as the ascidians or sea squirts) is a class in the Tunicata subphylum of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of the polysaccharide tunicin, as compared to other tunicates which are less rigid.