Georgette Douwma / Cock's comb oyster (Lopha cristagalli) covered with encrusting sponge on artificial reef. Mabul, Malaysia.

Sue Daly / Pacific oyster (Magallana gigas) farm, Herm, British Channel Islands, June 2016

Nick Upton / Pacific oyster / Japanese oyster / Miyagi oyster (Crassostrea gigas) attached to rocks among barnacles, mussels, limpets and anemones, exposed at low tide, Asturias, Spain, August

Philippe Clement / Cultivated oysters (Lophia folium) in bags at oyster farm / oyster park exposed on beach at low tide, Saint-Martin-de-Varreville, Normandy, France, June 2015

Georgette Douwma / Cock's comb oyster (Lopha cristagalli) covered with encrusting sponge on artificial reef. Mabul, Malaysia.

GEORGETTE DOUWMA / Cock's comb oyster (Lopha cristagalli) covered with encrusting sponge. Solomon Islands.

GEORGETTE DOUWMA / Mantle of Variable thorny oyster (Spondylus varians) covered with a red sponge. Solomon Islands.

GEORGETTE DOUWMA / Cock's comb oyster (Lopha cristagalli) covered with encrusting sponge. Solomon Islands.

GEORGETTE DOUWMA / Cock's comb oyster (Lopha cristagalli) covered with encrusting sponge. Solomon Islands.

Flip de Nooyer / Long-eared Owl (Asio otus) two owlets, Europe

Flip de Nooyer / Long-eared Owl (Asio otus) three owlets on branch, Europe

Tim Fitzharris / Long-eared Owl (Asio otus) perched in tree, circumpolar species, British Columbia, Canada