This common and active snail is found on and under rocks in the intertidal zone, often in great numbers. It has a dark grey to black shell, with regular white radial bars forming a zigzag line. It is similar to Chlorodiloma adelaidae and C. odontis, but its relatively well-defined bars distinguish it from C. adelaidae and it differs from C. odontis which has its white markings aligned with the whorls instead of across them radially.
