Heather Angel / Blind subterranean fish (Sinocyclocheilus sp) with head bump and no eyes. Found in Jiuxiang Cave. Captive in aquarium, Kunming, Yunnan, China.

Oscar Dewhurst / Great bittern (Botaurus stellaris) with common rudd (Scardinius erythrophthalmus) prey. Suffolk, UK. November

David Pattyn / Great Cormorant (Phalocrocorax carbo) catching a Tench (Tinca tinca), Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, July

Stephane Granzotto / Wels catfish (Silurus glanis) and Common carp (Cyprinus carpio), three on riverbed amongst branches, River Loire, France. October.

Stephane Granzotto / Wels catfish (Silurus glanis) and Common carp (Cyprinus carpio), three on riverbed amongst branches, River Loire, France. October.

Stephane Granzotto / Man looking at catch of Carp (Cyprinus carpio) taken from drained freshwater pond, France. March 2016.

Magnus Lundgren / Wild Wonders of China / Carp-like fish, unknown species, swimming in a river at Tangjiahe National Nature Reserve, Sichuan Province, China

Remi Masson / Two Tench (Tinca tinca) River Ain. Alps, Ain, France

Remi Masson / Group of Tench (Tinca tinca) swimming in the River Rhone, Rhone-Alpes, France, February.

Remi Masson / Common bream (Abramis brama) and Rudd (Scardinius hesperidicus) swimming amongst reeds in Lake Neuchatel, Switzerland, June.

Remi Masson / Shoal of Nase (Chondrostoma nasus) spawning, River Ain, Rhone-Alpes, France, April.

Remi Masson / Viperine water snake (Natrix maura) on the bottom of a river. Pyrenees, France, August.