Wild Wonders of Europe / Roggo / Pike (Esox lucius) in fishpond, Switzerland, February 2009

Will Watson / Wild reverted form of Domestic goldfish (Carassius auratus) captive, Herefordshire, England, UK, April

Michel Roggo / Atlantic Salmon (Salmo salar) young fry with yolk sac almost empty. Allier river, France, in hatchery of the Research Station Petite Camargue Alsacienne, France, February. Captive. Sequence 5 of 5.

Michel Roggo / Atlantic Salmon (Salmo salar) eggs. Allier River, France, in hatchery of the Research Station Petite Camargue Alsacienne, France, February. Sequence 1 of 5.

Wild Wonders of Europe / Roggo / Wels (Silurus glanis) during the spawning period, Rio Ebro, Spain, May 2007

Jussi Murtosaari / Fourhorn sculpin (Myoxocephalus / Triglopsis quadricornis) in aquarium, Kotka, Finland, March.

Wild Wonders of Europe / Lundgren / Northern pike (Esox lucius) in tributary to Old Danube, Danube Delta, Romania, June.

Linda Pitkin / 2020VISION / Brown trout (Salmo trutta) in turbulent water at a weir, River Ettick, Selkirkshire, Scotland, UK, October

Wild Wonders of Europe / Roggo / European grayling (Thymallus thymallus) eggs, 9 days, from Lake Thun, Switzerland, captive, April 2009

Michel Roggo / Atlantic salmon (Salmo salar) recently hatched fry with yolk sac. Allier river, France, in hatchery of the Research Station Petite Camargue Alsacienne, France, February. Sequence 4 of 5.

Wild Wonders of Europe / Lundgren / Freshwater goby (Gobiidae) at depth of 9 metres in tributary, Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / Northern pike (Esox lucius) resting at the surface at night, Danube Delta, Romania, June.