EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A3 - Infralittoral rock and other hard substrata > A3.7 - Features of infralittoral rock > A3.71 - Robust faunal cushions and crusts in surge gullies and caves > A3.712 - Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock

Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock

English name: Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock

Description (English)

Vertical very exposed and exposed bedrock gullies, tunnels and cave entrances subject to wave-surge dominated by sponge crusts such as Clathrina coriacea, Myxilla incrustans, Pachymatisma johnstonia and Halichondria panicea and anthozoans such as Sagartia elegans, Urticina felina, Alcyonium digitatum, Corynactis viridis and dwarf Metridium senile generally dominate the area; the anthozoans often appearing to protrude through the sponge layer. There may be dense aggregations of the hydroid Tubularia indivisa, the cup coral Caryophyllia smithii and the colonial ascidians Botrylloides leachi and Polyclinum aurantium. There may be a short crisiid turf, interspersed with Scrupocellaria reptans. Encrusting coralline algae may occur on well-illuminated rock faces. The echinoderms Asterias rubens, Marthasterias glacialis, Echinus esculentus, Antedon bifida and Ophiothrix fragilis, the topshell Calliostona zizphinum and the calcareous tubeworm Pomatoceros triqueter may also be present on the rock face. The crabs Cancer pagurus and Necora puber may also be recorded. Due to the wave-surged nature and vertical orientation of these biotopes, kelps are rare and certainly never dominate.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A3.712
Bern Convention Included in a Resolution 4 habitat type at a higher level (A3)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Alcyonium digitatum
Invertebrates Antedon bifida
Invertebrates Asterias rubens
Invertebrates Botrylloides leachi
Invertebrates Cancer pagurus
Invertebrates Caryophyllia smithii
Invertebrates Clathrina coriacea
Invertebrates Corynactis viridis
Invertebrates Echinus esculentus
Invertebrates Halichondria panicea
Invertebrates Marthasterias glacialis
Invertebrates Metridium senile
Invertebrates Myxilla incrustans
Invertebrates Necora puber
Invertebrates Ophiothrix fragilis
Invertebrates Pachymatisma johnstonia
Invertebrates Polyclinum aurantium
Invertebrates Pomatoceros triqueter
Invertebrates Sagartia elegans
Invertebrates Scrupocellaria reptans
Invertebrates Urticina felina
Species scientific name English common name Species group
Alcyonium digitatum Invertebrates
Antedon bifida Invertebrates
Asterias rubens Invertebrates
Botrylloides leachi Invertebrates
Cancer pagurus Invertebrates
Caryophyllia smithii Invertebrates
Clathrina coriacea Invertebrates
Corynactis viridis Invertebrates
Echinus esculentus Invertebrates
Halichondria panicea Invertebrates
Marthasterias glacialis Invertebrates
Metridium senile Invertebrates
Myxilla incrustans Invertebrates
Necora puber Invertebrates
Ophiothrix fragilis Invertebrates
Pachymatisma johnstonia Invertebrates
Polyclinum aurantium Invertebrates
Pomatoceros triqueter Invertebrates
Sagartia elegans Invertebrates
Scrupocellaria reptans Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 IR.FIR.SG.CrSpAsAn Anemones, including <I>Corynactis viridis</I>, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock source
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A3.712 Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock same
EUNIS Habitat Classification 200308 A3.4132 Sponge crusts, colonial (polyclinid) ascidians and a bryozoan/hydroid turf on wave-surged vertical or overhanging infralittoral rock wider
EUNIS Habitat Classification 200308 A3.412 Sponge crusts and anemones on wave-surged vertical infralittoral rock narrower
EUNIS Habitat Classification 200308 A3.121 Corynactis viridis, Metridium senile and Alcyonium digitatum on exposed or moderately vertical infralittoral rock narrower
EUNIS Habitat Classification 200202 A3.121 Corynactis viridis, Metridium senile and Alcyonium digitatum on exposed or moderately vertical infralittoral rock narrower
EUNIS Habitat Classification 200202 A3.4132 Sponge crusts, colonial (polyclinid) ascidians and a bryozoan/hydroid turf on wave-surged vertical or overhanging infralittoral rock narrower
EUNIS Habitat Classification 200202 A3.412 Sponge crusts and anemones on wave-surged vertical infralittoral rock narrower
EUNIS Habitat Classification 199910 A3.121 Corynactis viridis, Metridium senile and Alcyonium digitatum on exposed or moderately vertical infralittoral rock narrower
EUNIS Habitat Classification 199910 A3.4132 Sponge crusts, colonial (polyclinid) ascidians and a bryozoan/hydroid turf on wave-surged vertical or overhanging infralittoral rock narrower
EUNIS Habitat Classification 199910 A3.412 Sponge crusts and anemones on wave-surged vertical infralittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) EIR.SG.SCAn Sponge crusts and anemones on wave-surged vertical infralittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) IR.FaSwV.CorMetAlc Corynactis viridis, Metridium senile and Alcyonium digitatum on exposed or moderately vertical infralittoral rock narrower
MNCR BioMar 97.06 (Britain & Ireland) EIR.SG.SCAs.ByH Sponge crusts, colonial (polyclinid) ascidians and a bryozoan/hydroid turf on wave-surged vertical or overhanging infralittoral rock narrower
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