GB rarity status: Nationally Scarce
Distribution and Habitat
It occurs widely along the southern and eastern coastlines and is rarely found far above the supralittoral zone. It is typically associated with unvegetated rocky cliffs, boulder beaches or shingle beaches.
By day it occupies dark, humid and inaccessible crevices and can be extremely difficult to locate. It is most easily found by turning boulders on storm terraces or at the base of rocky sea cliffs, but rapidly seeks shelter when disturbed. On rocky cliffs it typically occurs with Ligia oceanica.
This summary is based on the detailed account in Gregory (2009).