Underwater , this anemone displays a large number of short and retractable tentacles arranged in six concentric rows .
Actinia mediterranea is a solitary anemone fixed on rocks with its cylindrical foot used as a suction pad .
Underwater , this anemone displays a large number of short and retractable tentacles arranged in six concentric rows .
Actinia mediterranea is a solitary anemone fixed on rocks with its cylindrical foot used as a suction pad .