Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy

Wild Wonders of Europe / Banfi / Nudibranch (Flabellina affinis) on algae (Caulerpa taxifolia) Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Alex Mustard / Hairy / striated frogfish (Antennarius striatus) amongst algae (Caulerpa taxifolia) West Palm Beach, Gulf Stream, West Atlantic Ocean, Florida, USA.

Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Roberto Rinaldi / Field of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Roberto Rinaldi / Sponge (Aplysina aerophoba) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy

Roberto Rinaldi / Alicia sea anemone (Alicia mirabilis) on fronds of invasive algae (Caulerpa taxifolia) Strait of Messina, Southern Italy

Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Roberto Rinaldi / Diver viewing Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

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 / Diver viewing mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy

Roberto Rinaldi / Seafan coral (Eunicella cavolini) amongst invasive algae (Caulerpa taxifolia) Strait of Messina, Southern Italy