Halophiloscia couchii (Kinahan, 1858)


GB IUCN status: Least Concern
GB rarity status: Nationally Scarce

ID Difficulty



This fast and agile species is reminiscent of an immature Ligia oceanica, but the stepped body outline and three flagella segments (very elongated) are characteristic (L. oceanica has numerous bead-like segments).

Keith Lugg
Keith Lugg
J.P. Richards
J.P. Richards
J.P. Richards
Steve Trewhella
Steve Trewhella

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).



Gregory, S. (2009) Woodlice and Waterlice (Isopoda: Oniscidea & Asellota) in Britain and Ireland.  Field Studies Council/Centre for Ecology & Hydrology.



BRC Code