Attached to Pecten novaezelandiae.
Image courtesy of Scott Tindale.
A colony of small ascidians (Clavelina sp.)
Giant Jelly Ascidian (Polycitor giganteus)
Sea Tulips (Pyura spinifera)
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.