When A. album is disturbed it will partly roll up leaving a few pairs of legs protruding to grip the substrate beneath it.

The lower lateral margins of the frontal triangle are sharply edged and concave, meeting at a sharp angle to form a vertical ridge.

This triangular structure extends beyond the eyes, creating a visible narrow ridge along the frontal margin of the head when viewed from above.

[5] The upper surfaces of the head, thoracic and abdominal segments, as well as the telson, are covered in numerous minute tubercles, often arranged in longitudinal rows.

The first free thoracic segment has a slightly curved upward anterior part of the epimera, and its posterolateral angle is somewhat produced with a rounded tip.

This distinguishes Armadillidium album from A. pulchellum, where the posterolateral angle of the first free thoracic segment is truncate.

[5] Armadillidium album possesses a wide European coastal distribution, where it can be found inhabiting both Temperate and Mediterranean climates.

The species has been recorded within coastal habitats of Belgium, France, Greece, Ireland, Italy, Portugal, Spain, the Netherlands and the United Kingdom.

While it can be encountered less frequently in salt marshes, its preferred habitat consists of sandy areas that have been relatively undisturbed.

[3][7] Armadillidium album is often found in close association with storm strandline debris and can be observed clinging to the underside of driftwood, taking refuge within crevices, or even burrowing to depths of 20–30 cm into the underlying sand.