EUNIS habitat classification 2017 > M - Marine benthic habitats > MC6 - Circalittoral mud > MC62 - Atlantic circalittoral mud > MC621 - Faunal communities of Atlantic circalittoral mud

Faunal communities of Atlantic circalittoral mud

Description (English)

Circalittoral, cohesive sandy mud, typically with over 20% silt/clay, generally in water depths of over 10 m, 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.
Sublittoral muds, occurring below moderate depths of 15-20 m, either on the open coast or in marine inlets such as sealochs. The seapens Virgularia mirabilis and Pennatula phosphorea are characteristic of this habitat type together with the burrowing anemone Cerianthus lloydii and the ophiuroid Amphiura spp. The relatively stable conditions often lead to the establishment of communities of burrowing megafaunal species, such as Nephrops norvegicus.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MC621
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Mysella bidentata
Invertebrates Nephrops norvegicus
Invertebrates Pennatula phosphorea
Species scientific name English common name Species group
Mysella bidentata Invertebrates
Nephrops norvegicus Invertebrates
Pennatula phosphorea Invertebrates

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.36 Circalittoral fine mud same
EUNIS Habitat Classification 200410 A5.721 Periodically and permanently anoxic sublittoral muds same
EUNIS Habitat Classification 200410 A5.35 Circalittoral sandy mud same
EUNIS Habitat Classification 200308 A4.36 Animal communities of circalittoral muds wider
EUNIS Habitat Classification 200202 A4.36 Animal communities of circalittoral muds wider
EUNIS Habitat Classification 200202 A4.35 Periodically and permanently anoxic sublittoral muds same
EUNIS Habitat Classification 199910 A4.36 Animal communities of circalittoral muds wider
EUNIS Habitat Classification 199910 A4.38 Periodically anoxic sublittoral muds same
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