Skip to Content

Marine Habitat Classification


Description of biotope or habitat type

To understand more about what this page is describing, see How to use the classification. See also How to cite.

   Circalittoral sandy mud


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Exposed, Moderately exposed, Sheltered, Very sheltered
Tidal streams Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible)
Substratum Mud with a significant fine to very fine sand fraction
Zone Circalittoral
Depth Band 5-10 m, 10-20 m, 20-30 m, 30-50 m, 50-100 m
Other Features

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.

Distribution of habitat SS.SMu.CSaMu Circalittoral sandy mud

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'
  • Predicted extent of the level 3 (for sublittoral rock & deep sea) or 4 (for sublittoral sediment) habitat

Point data based on records in the UK Marine Recorder Snapshot. Predicted habitat extent is from UKSeaMap.

Description

Circalittoral, cohesive sandy mud, typically with over 20% silt/clay, generally in water depths of over 10m, with weak or very weak tidal streams. This habitat is generally found in deeper areas of bays and marine inlets or offshore from less wave exposed coasts. Sea pens such as Virgularia mirabilis and brittlestars such as Amphiura spp. are particularly characteristic of this habitat whilst infaunal species include the tube building polychaetes Lagis koreni and Owenia fusiformis, and deposit feeding bivalves such as Mysella bidentata and Abra spp.

Situation

No situation data available.

Temporal variation

No temporal data available.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Kirchenpaueria pinnata 1 Occasional 21-40 %
Nemertesia ramosa 1 Occasional 21-40 %
Virgularia mirabilis 12 Occasional 61-80 %
Cerianthus lloydii 9 Occasional 41-60 %
Nemertea 4 Common 41-60 %
Thysanocardia procera 2 Common 21-40 %
Pholoe inornata 2 Frequent 21-40 %
Nephtys incisa 3 41-60 %
Lumbrineris gracilis 1 Common 21-40 %
Chaetopterus variopedatus 1 Occasional 21-40 %
Cirratulidae 2 Abundant 21-40 %
Diplocirrus glaucus 2 41-60 %
Scalibregma inflatum 1 Common 21-40 %
Owenia fusiformis 2 Common 41-60 %
Lagis koreni 3 Common 41-60 %
Melinna palmata 2 21-40 %
Terebellidae 1 Occasional 21-40 %
Lanice conchilega 3 Occasional 21-40 %
Pomatoceros triqueter 1 Occasional 21-40 %
Pariambus typicus 2 Frequent 21-40 %
Pagurus bernhardus 8 Occasional 41-60 %
Pagurus prideaux 2 Rare 21-40 %
Liocarcinus depurator 4 Occasional 41-60 %
Turritella communis 2 Occasional 21-40 %
Aporrhais pespelecani 1 Rare 21-40 %
Nuculoma tenuis 1 Frequent 21-40 %
Pecten maximus 7 Occasional 41-60 %
Mysella bidentata 19 Common 61-80 %
Phaxas pellucidus 1 Common 21-40 %
Abra alba 1 Common 21-40 %
Abra nitida 6 Abundant 41-60 %
Phoronis 5 Common 41-60 %
Asterias rubens 8 Occasional 61-80 %
Ophiuroidea 2 Abundant 21-40 %
Amphiura filiformis 18 Super abundant 61-80 %
Amphiura filiformis 2 Frequent 21-40 %
Ophiura albida 6 Frequent 41-60 %
Ophiura ophiura 4 Frequent 41-60 %
Echinus esculentus 2 Occasional 21-40 %

Similar biotopes

Not applicable or unknown.


Back to top