BIOTIC Species Information for Alkmaria romijni
Researched byNicola White Data supplied byMarLIN
Refereed byDr P. M. Gilliland
Distribution and Habitat
Distribution in Britain & IrelandSouthern shores of the North Sea as far north as the Humber, along the English Channel and round into Pembrokeshire.
Global distributionSouth from Baltic and North Sea coasts to Morocco.
Biogeographic rangeNot researched Depth rangeShallow
MigratoryNon-migratory / Resident   
Distribution Additional InformationAlkmaria romijni has been recorded from 27 sites around the UK (Gilliland & Sanderson, 2000; Thomas & Thorp, 1994). The majority of these are estuaries and the remainder lagoons. The species may be under-recorded due to it's small size. Alkmaria romijni is known from salinities of 5 to 48 ppt, but it's preferred range is thought to be 5 to 20 ppt (Paul Gilliland pers. comm.)

Substratum preferencesMud
Muddy sand
Muddy gravel
Physiographic preferencesIsolated saline water (Lagoon)
Ria / Voe
Biological zoneSublittoral Fringe
Lower Eulittoral
Wave exposureSheltered
Very Sheltered
Extremely Sheltered
Ultra Sheltered
Tidal stream strength/Water flowWeak (<1 kn)
SalinityVariable (18-40 psu)
Low (<18 psu)
Habitat Preferences Additional InformationNone entered
Distribution References Barnes, 1994, Arndt, 1989, Gilliland & Sanderson, 2000, Thomas & Thorp, 1994,
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