Actinochloris is a genus of green algae, in the family Actinochloridaceae, with a single species Actinochloris sphaerica.

[2] Actinochloris consists of solitary cells.

They are initially broadly ellipsoid to ovoid but always spherical when mature, and up to 85 μm in diameter.

Cells contain a single large chloroplast with many lobes; there is a large thick central piece containing a single large pyrenoid.

From the pyrenoid, there are many irregularly arranged lobes that branch out to the periphery of the cell.