Willem Kolvoort / Brook with Rigid Hornwort (Ceratophyllum demersum), Shining Pondweed (Potamogeton lucens) with Great Yellowcress (Rorippa amphibia) North Holland. June.

Willem Kolvoort / Great diving beetle male (Dytiscus marginalis) on Shining pondweed (Potamogeton Lucens), sand-winning Pit, Holland

Willem Kolvoort / Looking up at Shining pondweed (Potamogeton lucens) from bottom of sand winning pit, Holland

Willem Kolvoort / European edible frog developing tadpole (Rana esculenta) scraping algae from Shining pondweed (Potamogeton lucens) Holland

Willem Kolvoort / Semi-aquatic beetles (Macroplea appendiculata) on Shining pondweed (Potamogeton lucens) with Rotifer colonies (Sinantherina), sand-winning pit, Holland

Franco Banfi / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens), Sion, Valais canton, southwestern Switzerland, Europe

Franco Banfi / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens), Sion, Valais canton, southwestern Switzerland, Europe

Franco Banfi / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens), Sion, Valais canton, southwestern Switzerland, Europe

Franco Banfi / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens), Sion, Valais canton, southwestern Switzerland, Europe

Franco Banfi / Pondweed (Potamogeton lucens), Sion, Valais canton, southwestern Switzerland, Europe

Michel Roggo / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens) on tbed of Lake Neuchatel, Switzerland, September. Photographed for The Freshwater Project.

Michel Roggo / Northern pike (Esox lucius) amongst Shining pondweed (Potamogeton lucens). Lake Neuchatel, Switzerland, September. Photographed for The Freshwater Project.