Are the yellow anemones elegant anemones? Unsure because the column wasn't spotty.
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you are probably right, the only other anemone that has a similar pattern of colouration and tentacles is the fried egg anemone actinothoe sphyrodeta which has white stripes on column as opposed to the spots in the elegant anemone which can be quite inconspicuous
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Lat/Lng: 50.428, -5.064
OS grid ref: SW824631