David Pattyn / Great crested grebe (Podiceps cristatus) adult with freshly caught fish. Tench (Tinca tinca) to feed to its young chick, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June

Michel Roggo / Tench (Tinca tinca) on the surface of a turbid marsh pond, with Rudd (Scardinius erythrophthalmus) above, Fribourg, Switzerland, 2004

Wild Wonders of Europe / Roggo / Tench (Tinca tinca) in peat pond, Fribourg, Switzerland, May 2009

Wild Wonders of Europe / Roggo / Tench (Tinca tinca) in peat pond, Fribourg, Switzerland, May 2009

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

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 / Tench (Tinca tinca) under waterlily leaves, near the River Ain, France

Remi Masson / Tench (Tinca tinca) near the River Ain, Alps, France, June.

Remi Masson / Tench (Tinca tinca) and perch (Perca fluviatilis) near the river Ain, France, July.

Jussi Murtosaari / Tench (Tinca tinca), Finland, July.

MYN / Paul van Hoof / Tench (Tinca tinca) subadult, The Netherlands, June, Meetyourneighbours.net project

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair, one with tench fish to feed chicks, Lake Geneva, Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding their chicks with a small tench fish. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding tench fish to their chicks, which are carried on their backs. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding tench fish to their chicks, which are carried on their backs. Lake Geneva, Geneva, Switzerland

Laurent Geslin / Great crested grebe (Podiceps cristatus) pair feeding tench fish to their chicks, which are carried on their backs. Lake Geneva, Geneva, Switzerland

Cyril Ruoso / Tench (Tinca tinca) fish swimming among pond vegetation, Yonne, France

Paul Hobson / Tench (Tinca tinca) underwater in stream, Yorkshire UK

Michel Roggo / Tench (Tinca tinca) Europe

Michel Roggo / Tench (Tinca tinca) male, Aare river, Switzerland 2006

Wild Wonders of Europe / Roggo / Tench (Tinca tinca) in peat pond, Fribourg, Switzerland, May 2009

Jane Burton / Minnow {Phoxinus phoxinus} and Tench {Tinca tinca} captive, from Europe

Willem Kolvoort / Tench (Tinca tinca) amongst aquatic plants, Lake Naarden, Holland

Willem Kolvoort / Tench (Tinca tinca) in sand winning pit, Holland

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male nest building. Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male, Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse pair on reef {Symphodus tinca} Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male carrying algae for nest building. Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse pair {Symphodus tinca} Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse pair {Symphodus tinca} Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male nest building. Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male portrait Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male nest building. Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male, Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse pair {Symphodus tinca} Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male releasing sperm into water. Mediterranean

Jose B. Ruiz / East atlantic peacock wrasse {Symphodus tinca} male nest building. Mediterranean

Michel Roggo / Underwater shot of a Tench (Tinca tinca) in a peat bog pool, in the shade of trees and aquatic plants. The water is red tannin-stained and acidic, with an upper layer of clean water from heavy rains....

David Pattyn / Great crested grebe (Podiceps cristatus) chick swallowing a Tench (Tinca tinca) next to watchful parents, Valkenhorst Nature Reserve,The Netherlands, Europe. May.

Franco Banfi / Tench (Tinca tinca) amongst reeds, Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca) ) digs for food on the bottom, Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca) during spawning period amongst European watermilfoil (Myriophyllum spicatum), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca) during spawning period amongst European watermilfoil (Myriophyllum spicatum), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca) during spawning period amongst European watermilfoil (Myriophyllum spicatum), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca) amongst European watermilfoil (Myriophyllum spicatum), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca), Sion, Valais canton, southwestern Switzerland

Franco Banfi / Tench (Tinca tinca), Sion, Valais canton, southwestern Switzerland

David Pattyn / Great crested grebe (Podiceps cristatus) parents busy feeding their young with fish, in this case a small Tench (Tinca tinca) Valkenhorst Nature Reserve, Valkenswaard, The Netherlands. June

David Pattyn / Great crested grebe (Podiceps cristatus) parents busy feeding their young with fish, in this case a small Tench (Tinca tinca) Valkenhorst Nature Reserve, Valkenswaard, The Netherlands. June

David Pattyn / Great crested grebe (Podiceps cristatus) young chick with freshly caught fish. Tench (Tinca tinca) given by one of its parents Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June

David Pattyn / Great crested grebe (Podiceps cristatus) adult with freshly caught fish. Tench (Tinca tinca) to feed to its young chick, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June

Franco Banfi / East Atlantic peacock wrasse (Symphodus tinca) caught in a net, Vis Island, Croatia, Adriatic Sea, Mediterranean

Michel Roggo / Tench (Tinca tinca), male, close to the nest with the female (see the caudal fin) with European white waterlily (Nymphaea alba) on the bed of Lake Morat, close to Faoug, Canton of Fribourg, Switzerlan...

Michel Roggo / Yellow water-lily (Nuphar lutea) with Tench (Tinca tinca) on the ground of Lake Morat, close to Faoug, Canton of Fribourg, Switzerland. May. Photographed for The Freshwater Project.