Constantinos Petrinos / Coloured tube anemone (Cerianthus membranaceus) Athens, Attica Region, Greece. Saronic Gulf, Aegean Sea. August.

Albert Lleal / Tube-dwelling Anemone (Cerianthus membranaceus) showing fluorescence under ultraviolet light

Franco Banfi / Tube anemone (Cerianthus membranaceus) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Solvin Zankl / Tube anemone (Cerianthus membranaceus) San Pietro Island, Sardinia, Italy, Mediterranean, July

Roberto Rinaldi / Tube anemone (Cerianthus membranaceus) on sea bed amongst shoots of the invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy Sequence 2/2

Roberto Rinaldi / Tube anemone (Cerianthus membranaceus) on sea bed, Strait of Messina, Southern Italy. Sequence 1/2

Birgitte Wilms / Tube-dwelling Anemone (Cerianthus membranaceus), Galapagos Islands, Ecuador

Jose B. Ruiz / Tube sea anemone {Cerianthus membranaceus} Mediterranean Spain

Jose B. Ruiz / Tube sea anemone {Cerianthus membranaceus} Mediterranean Spain

Jose B. Ruiz / Tube sea anemone {Cerianthus membranaceus} Mediterranean Spain

Jose B. Ruiz / Tube sea anemone {Cerianthus membranaceus} Mediterranean

Jose B. Ruiz / Tube sea anemone {Cerianthus membranaceus} Mediterranean