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Place name : Ruecallan Archway, Rathlin Island. County : Antrim

Date : 2025-05-20 GPS : 55.30720,-6.27200. Depth : -10.0 to -31.0 m. [ View map ]

Site Description : Vertical limestone wall with archway on Rathlin's north wall.

Yellow and white soft corals, Alcyonium digitatum, [00:01:56]; Jewel anemones, Corynactis viridis, [00:02:29]; Elegant anemones, Cylista elegans, [00:02:47]; Plumose anemones, Metridium senile, [00:03:13]; Volcano sponge, Haliclona viscosa, [00:03:32]; Spiny lobster, Palinurus elephas, [00:03:43]; Yellow cluster anemone, Parazoanthus axinellae [00:03:57]; Roof of arch covered in soft coral, Alcyonium digitatum, [00:04:37]; Sponge, Tethyspira spinosa, [00:06:16]; Sea beech, Delesseria sanguinea, [0:06:47]; Kelp forest, Laminaria hyperborea, [00:07:40]

Biotope 1 : Kelp forest - Laminaria hyperborea forest with dense foliose red seaweeds on exposed upper infralittoral rock.

PORIFERA
Clathrina lacunosa R
CNIDARIA
Obelia geniculata C
Alcyonium digitatum R
TUNICATA
Aplidium punctum F
PISCES
Pollachius pollachius R
RHODOPHYTA
Delesseria sanguinea A
Phycodrys rubens A
CHROMOPHYTA
Laminaria hyperborea A

Biotope 2 : Vertical wall and archway - Sponges and anemones on vertical circalittoral bedrock.

PORIFERA
Dysidea fragilis O
Pachymatisma johnstonia F
Pachymatisma johnstonia O
Axinella infundibuliformis C
Raspailia hispida C
Raspailia ramosa F
Stelligera stuposa C
Polymastia boletiformis F
Polymastia penicillus O
Sphaerotylus renoufi R
Tethya citrina O
Iophonopsis nigricans F
Hemimycale columella F
Hymedesmia paupertas C
Phorbas fictitius O
Desmacella cf. annexa O
Haliclona viscosa F
CNIDARIA
Tubularia indivisa A
Ectopleura larynx F
Eudendrium annulatum P
Halecium halecinum O
Kirchenpaueria pinnata R
Nemertesia antennina C
Nemertesia ramosa O
Aglaophenia tubulifera F
Sarcodictyon catenatum R
Alcyonium digitatum C
Alcyonium hibernicum R
Epizoanthus couchii O
Parazoanthus anguicomus F
Parazoanthus axinellae F
Metridium senile O
Cylista elegans F
Actinothoe sphyrodeta F
Corynactis viridis C
Caryophyllia smithii A
Caryophyllia smithii F
CRUSTACEA
Palinurus elephas R
Cancer pagurus R
MOLLUSCA
Colpodaspis pusilla R
Polycera faeroensis R
Rostanga rubra R
ECHINODERMATA
Henricia oculata O
Marthasterias glacialis R
Echinus esculentus R
Holothuria forskali R
TUNICATA
Pycnoclavella stolonialis P
Aplidium nordmanni F
Aplidium punctum F
Ascidia mentula R
Polycarpa pomaria F
RHODOPHYTA
Delesseria sanguinea O

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