Georgette Douwma / Chocolate chip sea star o (Protoreaster nodosus) on sandy bottom. Mabul, Malaysia.

David Fleetham / Sea snail (Thyca crystallina), two growing on host Blue sea star (Linckia laevigata). Philippines.

Markus Varesvuo / King eider (Somateria spectabilis) male feeding on starfish, Batsfjord, Norway March

Georgette Douwma / Artificial coral reef site with a Blue starfish (Linckia laevigata) Mabul, Malaysia.

Pascal Kobeh / Giant triton (Charonia tritonis) eating a Crown-of-thorns starfish (Acanthaster planci) at night. New Caledonia. Pacific Ocean.

Pascal Kobeh / Giant triton (Charonia tritonis) eating a Crown-of-thorns starfish (Acanthaster planci) at night. New Caledonia. Pacific Ocean.

Pascal Kobeh / Comet starfish (Linckia multifora) at night, Palau. Philippine Sea.

Pascal Kobeh / Crown of thorns starfish (Acanthaster planci) eating the polyps of soft corals, Baja California peninsula, Mexico. Sea of Cortez.

Franco Banfi / Slope close to wreck of the cargo boat 'Vassilios T' with Bearded fireworm (Hermodice carunculata) with Sea star (Hacelia attenuata) Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Scuba diver and Sea star (Hacelia attenuata) Stupiste Out dive site, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Sea star (Hacelia attenuata) on a rock close to Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Penta star (Peltaster placenta) Stupiste In dive site, Vis Island, Croatia, Adriatic Sea, Mediterranean