No interactions present.
For gem anemone see http://www.marlin.ac.uk/speciesinformation.php?speciesID=2682 and http://www.ispot.org.uk/node/79355
For Anthopleura thallia, http://www.habitas.org.uk/marinelife/species.asp?item=D11800 (though habitas says "only extreme SW of Devon/Cornwall/Dyfed" there's "recent sightings in Donegal & outer Hebrides")
Lat/Lng: 54.087959, -4.760922
OS grid ref: SC195693