Moross Castle, Moross Channel, Mulroy Bay.
Subsite name: Gravel with Limaria hians bed.
Surveyors: Christine Morrow, Bernard Picton
| Phylum | Species | Abundance |
| PORIFERA | Sycon ciliatum | rare |
| PORIFERA | Amphilectus fucorum | frequent |
| PORIFERA | Suberites carnosus | occasional |
| CNIDARIA | Hydractinia echinata | present |
| CNIDARIA | Anemonia viridis | present |
| CNIDARIA | Anthopleura ballii | common |
| CNIDARIA | Metridium dianthus | occasional |
| CNIDARIA | Sagartia elegans | frequent |
| CNIDARIA | Cereus pedunculatus | common |
| ANNELIDA | Terebellidae | frequent |
| CRUSTACEA | Pagurus bernhardus | frequent |
| CRUSTACEA | Ebalia tumefacta | rare |
| CRUSTACEA | Hyas araneus | occasional |
| CRUSTACEA | Inachus dorsettensis | frequent |
| CRUSTACEA | Necora puber | present |
| CRUSTACEA | Carcinus maenas | occasional |
| MOLLUSCA | Gibbula magus | occasional |
| MOLLUSCA | Buccinum undatum | common |
| MOLLUSCA | Haminoea navicula | present |
| MOLLUSCA | Limaria hians | abundant |
| MOLLUSCA | Pecten maximus | frequent |
| ECHINODERMATA | Solaster endeca | occasional |
| ECHINODERMATA | Henricia oculata | occasional |
| ECHINODERMATA | Asterias rubens | common |
| ECHINODERMATA | Ophiothrix fragilis | common |
| ECHINODERMATA | Thyone fusus | occasional |
| TUNICATA | Clavelina lepadiformis | occasional |
| PISCES | Callionymus lyra | occasional |
| PISCES | Gobius niger | occasional |
| PISCES | Gobius paganellus | rare |
| RHODOPHYTA | Corallinaceae | present |
| RHODOPHYTA | Lithothamnion corallioides | present |
| RHODOPHYTA | Dudresnaya verticillata | occasional |
| RHODOPHYTA | Halarachnion ligulatum | present |
| RHODOPHYTA | Callophyllis laciniata | frequent |
| RHODOPHYTA | Kallymenia reniformis | frequent |
| RHODOPHYTA | Plocamium cartilagineum | frequent |
| RHODOPHYTA | Griffithsia corallinoides | occasional |
| CHROMOPHYTA | Laminaria saccharina | occasional |