Ooooooo.... stellate incurrent siphons.... yes, yes.... could be a determinant trait.LeslieH:Er, I'd go with tunicate although I wouldn't be so bold as to specify a genus. That pattern of stellate incurrent siphon openings & a few large excurrent openings is common. Maybe family Didemnidae. Take a look at this:
http://www.ascidians.com/families/didemnidae/Didemnid_greenstar/didemnidgreenstar1.htm
Like I say, we need to go see for ourselves. Missdirected, where do we find this wee beastie??? Will you take us there???

Rick