Jan Hamrsky / River snail (Viviparus sp.) and Great ramshorn snail (Planorbarius corneus), Europe, April, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis), on piece of submerged wood, June, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis), on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis) on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Ramshorn snails (Planorbis planorbis), on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis), on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis), on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Ramshorn snail (Planorbis planorbis), on stone underwater, Europe, June, controlled conditions

Jan Hamrsky / Great ramshorn snail (Planorbarius corneus) juvenil, onstem of aquatic plant, Europe, June, controlled conditions

Jan Hamrsky / Great ramshorn snails (Planorbarius corneus) juvenil, feeding on a stem of horsetail plant, Europe, November, controlled conditions

Jan Hamrsky / Great ramshorn snail (Planorbarius corneus) Europe, June, controlled conditions.

Jan Hamrsky / Freshwater snail (Planorbidae) on stem, Europe, June, controlled conditions.

Jan Hamrsky / Nautilus ramshorn snail (Gyraulus crista) on stem, Europe, June, controlled conditions.

Jan Hamrsky / Freshwater limpet (Ferrissia sp) Europe, March, controlled conditions.

Jan Hamrsky / Freshwater limpet (Ferrissia sp) Europe, March, controlled conditions.

Jan Hamrsky / Freshwater limpet (Ferrissia sp) Europe, March, controlled conditions.

Olga Kamenskaya / Snails (Baicalia turriformis, Acroloxidae sp and Choanomphalus sp) Lake Baikal, Russia, May.

Olga Kamenskaya / Great ramshorn snails (Planorbis planorbis) and Amphipod (Acanthogammarus maculosus) on cortical sponges. Lake Baikal, Russia, March.

Jan Hamrsky / Freshwater snail (Planorbidae) crawling among colonies of Ciliates (Carchesium) Europe, July, controlled conditions

Jan Hamrsky / Freshwater snail (Planorbidae) crawling among colonies of Ciliates (Carchesium) Europe, July, controlled conditions

Wild Wonders of Europe / Lundgren / European white waterlily (Nymphaea alba) with Great ram's horn snail (Planorbarius corneus) Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / European white waterlily (Nymphaea alba) with Great ram's horn snail (Planorbarius corneus) Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / Great ram's horn snail (Planorbarius corneus) Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / Empty Great ram's horn snail (Planorbarius corneus) shells laying on riverbed of a small tributary to Danube Delta, Romania, June.

Alex Mustard / Freshwater limpet (Ancylus fluviatilis) in a river. This species actually is more closely related to horned snails than marine limpets and can breath air. River Flumendosa, Gennargentu National Park,...

Willem Kolvoort / Ramshorn snail (Planorbis planorbis) and Chinamark moth larva (Nymphula nympheata) underwater on the leaf of the White water lily (Nymphaea alba) in garden pond, Holland

Willem Kolvoort / Great pond snail (Lymnaea stagnalis) and two Great ramshorn snails (Planorbis corneus) under leaf of White water lily (Nymphaea alba) garden pond, Holland

Willem Kolvoort / Great ramshorn snail (Planorbis corneus) sand winning pit, Holland. This snail does not have enough pigment in its skin, the red colour is caused by haemaglobin.

Willem Kolvoort / Great ramshorn snail (Planorbis corneus) sand winning pit, Holland

Willem Kolvoort / Ramshorn snail (Planorbis planorbis) in garden pond, Holland

Willem Kolvoort / Moss animals (Cristatella mucedo), Zebra mussel (Dreissena polymorpha) and Ramshorn snail (Planorbidae), all on submerged branch, peat bog lake, Holland

Willem Kolvoort / Moss animals / Bryozoans, white colony of (Cristatella mucedo) and large colony of (Plumatella repens) cover underwater branch, sand winning pit, Holland. There are also two Zebra mussels (Dreissena...

Willem Kolvoort / Ramshorn snail (Planorbis planorbis) feeding on algae on reed stem, Holland

Willem Kolvoort / Ramshorn Snail (Planorbis planorbis) juvenile, Holland

Willem Kolvoort / Great ramshorn snail (Planorbius corneus) feeding on algae on plant, Holland

Willem Kolvoort / Great ramshorn snail (Planorbius corneus) feeding on algae on plant, Holland

Willem Kolvoort / Great ramshorn snail (Planorbius corneus) feeding on algae on growing water lily leaf, Holland

Willem Kolvoort / Great ramshorn snail (Planorbis corneus) feeding on alage on leaf, Lake Naarden, Holland

Willem Kolvoort / Ramshorn snail (Planorbis planorbis} feeding on algae on leaf, Lake Naarden, Holland

Willem Kolvoort / Great ramshorn snail (Planorbis corneus) feeding on alage on growing leaf of Yellow water lily, Lake Naarden, Holland