Asteromonas (ass-tear-owe-moan-ass) gracilis, a volvocalean green alga - a group more usually associated with freshwater habitats. With grass green chloroplast with cup-shape (mostly located at base of cells but extending up along the sides), two polar flagella, and starch-enclosed pyrenoid appearing as a disc near posterior end. Cell usually with 6 surface ridges. Differential interference microscopy.

data on this strain.