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

Date : 2025-05-22 GPS : 55.30763,-6.26767. Depth : -10.0 to -32.0 m. [ View map ]

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

Yellow staghorn sponge, Axinella dissimilis, [00:00:30]; Yellow staghorn sponge, Axinella dissimilis, [00:01:21]; Yellow and white soft corals, Alcyonium digitatum, [00:01:33]; Bright yellow sponge, Spongosorites calcicola, [00:01:48]; White cluster anemones, Parazoanthus anguicomus, [00:04:19]; Rare sponge, Tethyspira spinosa, [00:05:24]; Ballan wrasse, Labrus betgylta, [00:06:24]; Forest kelp, Laminaria hyperborea, [00:06:57]

Biotope 1 : Vertical limestone wall and archway (Sponges and anemones on vertical circalittoral bedrock).

PORIFERA
Stryphnus ponderosus P
Pachymatisma johnstonia F
Dercitus bucklandi F
Axinella damicornis R
Axinella dissimilis R
Axinella infundibuliformis C
Raspailia hispida C
Raspailia ramosa R
Tethyspira spinosa R
Stelligera stuposa C
Polymastia boletiformis F
Polymastia penicillus R
Sphaerotylus renoufi O
Tethya citrina F
Hemimycale columella R
Phorbas fictitius O
Desmacella cf. annexa O
Spongosorites calcicola O
Haliclona viscosa F
CNIDARIA
Tubularia indivisa O
Halecium halecinum F
Nemertesia antennina C
Nemertesia ramosa O
Aglaophenia tubulifera F
Alcyonium digitatum C
Epizoanthus couchii O
Parazoanthus anguicomus C
Parazoanthus axinellae C
Actinothoe sphyrodeta F
Caryophyllia smithii A
ANNELIDA
Filograna implexa R
CRUSTACEA
Adna anglica F
Cancer pagurus R
MOLLUSCA
Colpodaspis pusilla P
Polycera faeroensis R
Edmundsella pedata R
BRYOZOA
Crisia denticulata C
Crisia eburnea C
Plagioecia patina O
Caberea boryi F
Cellaria sp. O
Porella compressa O
Parasmittina trispinosa O
ECHINODERMATA
Henricia oculata R
Marthasterias glacialis R
Ophiactis balli P
Echinus esculentus R
TUNICATA
Clavelina lepadiformis R
Polyclinum aurantium O
Aplidium nordmanni O
Aplidium punctum F
Didemnidae sp. O
Ascidia mentula R
Ascidia virginea R
RHODOPHYTA
Rhodophyllis divaricata F
Delesseria sanguinea O

Biotope 2 : Kelp & mixed red algae (Laminaria hyperborea forest with dense foliose red seaweeds on exposed upper infralittoral rock).

PORIFERA
Axinella infundibuliformis R
CNIDARIA
Nemertesia antennina R
Obelia geniculata C
Caryophyllia smithii O
ECHINODERMATA
Marthasterias glacialis R
TUNICATA
Aplidium nordmanni R
PISCES
Labrus bergylta R
RHODOPHYTA
Rhodophyllis divaricata F
Delesseria sanguinea A
Phycodrys rubens C
CHROMOPHYTA
Laminaria hyperborea A

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