BIOTIC

BIOTIC Species Information for Crangon crangon
All Taxonomy Biology Distribution Reproduction

Researched by	Ken Neal	Data supplied by	MarLIN
Refereed by	This information is not refereed.
Distribution and Habitat
Distribution in Britain & Ireland	Found on sandy and muddy bottoms around all British and Irish coasts.
Global distribution	Found from the Finnish coast South into the Baltic and into the Mediterranean.
Biogeographic range	Not researched	Depth range	Intertidal to 150 metres
Migratory
Distribution Additional Information	Six distinct populations of Crangon crangon have been identified around the English and Welsh coasts. Northern North Sea from Spurn Head northwards. Southern North Sea from Spurn Head to Dungeness including the Dutch and Belgian coasts. English Channel from Dungeness West to Start Point and the north coast of France. South West Britain, the Atlantic coast of Devon, Cornwall and Wales to the northern areas of Cardigan Bay. A Bristol Channel population that has its eastern limit between Nash Point and Porlock Bay. Irish Sea north from northern areas of Cardigan Bay. All populations are kept distinct by fronts of water masses preventing larval mixing (Henderson et al., 1990).

Substratum preferences	Fine clean sand Mud Muddy sand Sandy mud	Physiographic preferences	Open coast Offshore seabed Strait / sound Sealoch Ria / Voe Estuary Isolated saline water (Lagoon) Enclosed coast / Embayment
Biological zone	Mid Eulittoral Lower Eulittoral Sublittoral Fringe Upper Infralittoral Lower Infralittoral Upper Circalittoral Lower Circalittoral Circalittoral Offshore	Wave exposure	Very Exposed Exposed Moderately Exposed Sheltered Very Sheltered Extremely Sheltered Ultra Sheltered
Tidal stream strength/Water flow	Moderately Strong (1-3 kn) Weak (<1 kn)	Salinity	Full (30-40 psu) Low (<18 psu) Variable (18-40 psu) Reduced (18-30 psu)
Habitat Preferences Additional Information
Distribution References	Henderson et al., 1990, Pinn & Ansell, 1993, Al-Adhub & Naylor, 1975, Boddeke, 1975,