Galathea intermedia is common, but cryptic, on Clyde maerl deposits where it lives in small groups of mixed sex and age, sharing shelters (typically dead Dosinia shells) to avoid predation. Its appearance is marked by six iridescent blue spots which may play an important role in intra- or interspecific interactions.
Hall-Spencer, J. M., Moore, P. G., & Sneddon, L. U. (1999). Observations and possible function of the striking anterior coloration pattern of Galathea intermedia (Crustacea: Decapoda: Anomura). Journal of the Marine Biological Association of the UK, 79(02), 371-372.