While kayaking in shallow water close about 20ft from shore, we found this tunicate attached to a blade of eelgrass (/Zostera marina/). The blade of eelgrass was floating on the surface of the water and no longer attached to the substrate.
black sea squirt on the left side of the photograph
Small strawberryish tunicates with cool star-shaped openings.
This colonial tunicate was found surrounding the sea squirt styela clava, which was attached to a buoy off of MBL dock. This particular colonial is a more recent arrival in the area.
This sea squirt was collected from beneath MBL dock. It can be identified due its rough texture and is often called the "rough sea squirt".
Collected off of a buoy attached to the MBL dock. This invasive from Japan can be identified by its bright color and the irregular linear nature of its zooids.
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.