Perophora japonica Oka, 1927  

This species is a social ascidian, with individual zooids connected basally by stolons. Together, zooids and stolons often form a dense mass similar to a tiny bunch of grapes. Individual zooids are globular in shape, measure 2-4 mm in diameter, and covered by a pale green tunic. Stolons are characterized by distinct, star-shaped flattened terminal buds, yellow in color.