Individual incurrent siphons (white rings), communal excurrent siphon (black opening). On mussel growing on pilings at Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 11/20/08. © Peter J. Bryant

Colonial Tunicate

Botrylloides diegensis (red/white form)

Urochordata: Ascidiacea

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Individual incurrent siphons (white rings), communal excurrent siphon (black opening). On mussel growing on pilings at Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 11/20/08. © Peter J. Bryant

Individual incurrent siphons (white rings), communal excurrent siphon (black opening). On mussel growing on pilings at Shellmaker Island, Upper Newport Bay, Newport Beach, Orange County, CA. 11/20/08. © Peter J. Bryant