A rising tide sweeps strongly across this overhanging wall. Because it is so exposed, plumose anemones, Metridium senile, have become established there. They are filter feeding anemones, trapping plankton from the water as it is forced through their feathery tentacles. Once the tide stops running they will retract and become just lumps of tissue on the rocks, giving no hint of their real beauty.
North Sea. St. Abbs Marine Reserve