Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Neil Bromhall / Bitterling {Rhodeus sericeus} laying eggs into mussel, Europe
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011. 2020VISION Book Plate.
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussel (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussel (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Linda Pitkin / 2020VISION / Freshwater pearl mussels (Margaritifera margaritifera) on river bed, Ennerdale Valley, Lake District NP, Cumbria, England, UK, October 2011
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Willem Kolvoort / Endemic Mussels (Dreissena presbensis / stankovici) on lake bed at -36 meters, Albania, Eastern Europe, May
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Willem Kolvoort / Underwater rock with endemic Mussels (Dreissena presbensis / stankovici) and Sponges (Spongilla stankovici) Albania, Eastern Europe, May
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Willem Kolvoort / Lake bed with endemic Sponge (Porifera), Shrimps (Ohridaspongia rotunda) and Mussels, Albania, Eastern Europe, May
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Willem Kolvoort / endemic Mussels (Dreissena presbensis / stankovici), Albania, Eastern Europe, May
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Willem Kolvoort / endemic Mussels (Dreissena presbensis / stankovici), Albania, Eastern Europe, May
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Willem Kolvoort / Endemic Mussel (Dreissena presbensis / stankovici), Albania, Eastern Europe, May
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Willem Kolvoort / Underwater rock with endemic Mussels (Dreissena presbensis / stankovici) and Sponges (Spongilla stankovici) Albania, Eastern Europe, May
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Willem Kolvoort / Underwater rock with endemic Mussels (Dreissena presbensis / stankovici) and Sponges (Spongilla stankovici) Albania, Eastern Europe, May
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Alex Mustard / 2020VISION / Colony of Zebra mussels (Dreissena polymorpha) in flooded quarry, a non-native, invasive species, Stoney Cove, Stoney Stratford, Leicestershire, UK, December
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Toby Roxburgh / Freshwater / river mussel (Unio tumidus) shells on the bank of a small rhyne / drainage ditch in the Han Wall RSPB National Nature Reserve, England, December 2009.
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Jerry Monkman / Dwarf Wedge Mussel (left), Eastern Elliptio (top), and Eastern Lampmussel (right.) found in the Ashuelot River. Keene, New Hampshire, USA, September 2006.
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Jerry Monkman / Mussel researcher Ethan Nedeau holding three species of freshwater Mussels (Mytillus genus) from the Ashuelot River. Keene, New Hampshire, USA, September 2006.
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Robert Thompson / Freshwater pearl mussel {Margaritifera margaritifera} in Ballinderry River, County Tyron, Republic of Ireland, March
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Robert Thompson / Freshwater pearl mussel {Margaritifera margaritifera} in Ballinderry River, County Tyron, Republic of Ireland, March
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Robert Thompson / Zebra Mussels {Dreissena polymorpha} Lower Lough Erne, County Fermanagh, Northern Ireland, UK
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Robert Thompson / Zebra Mussels {Dreissena polymorpha} Lower Lough Erne, County Fermanagh, Northern Ireland, UK
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Wild Wonders of Europe / Roggo / Freshwater pearl mussel (Margaritifera margaritifera) on river bed, Umeälven tributary, Sweden, July 2008
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Neil Bromhall / Bitterling {Rhodeus sericeus} laying eggs into mussel, Europe
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Nature Production / Oily shiner {Sarcocheilichthys variegatus} inserting its ovipositor and laying eggs in Asian Freshwater Mussel {Anodonta (Sinanodonta) woodiana} captive, Japan
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Willem Kolvoort / Freshwater pearl mussels (Margaritifera margaritifera) in river, East Latvia
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Willem Kolvoort / Underwater view of Greater european pea clam(Pisidium amnicum) in garden pond, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnaea) walking along river bed floor, IJsselmeer, Holland
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Willem Kolvoort / Freshwater pearl mussel (Margaritifera margaritifera) inlet opening, East Latvia
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Willem Kolvoort / Entrance and discharge openings of the Swan mussel (Anodonta cygnaea) sand winning pit, Holland
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Willem Kolvoort / Semi-aquatic weevil (Pachyrhinus / Bagous elegans) on Swan mussel (Anodon cygnaea), Lake Naarden, Holland
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Willem Kolvoort / Freshwater pearl mussels (Margaritifera margaritifera) in fast flowing river, East Latvia
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Willem Kolvoort / Moss animals / Bryozoans {Cristatella mucedo} (above) and {Plumatella repens} Sand-winning Pit, Holland
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Willem Kolvoort / Moss animals (Cristatella mucedo), Zebra mussel (Dreissena polymorpha) and Ramshorn snail (Planorbidae), all on submerged branch, peat bog lake, Holland
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Willem Kolvoort / Swan mussels (Anodonta cygnaea) and Perfoliate pondweed (Potamogeton perfoliatus) Czarna Hanca river, Poland
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Willem Kolvoort / Underwater mass of Zebra mussels (Dreissena polymorpha) in sand winning pit, Holland
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Willem Kolvoort / A big Zebra mussel (Dreissena polymorpha) with a lot of young mussels around it, maybe offspring, sand winning pit, Holland
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Willem Kolvoort / Close up of Swan mussel (Anodonta cygnaea) the opening with the tentacles is the inlet of the mussel, sand winning pit, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnaea) on bottom of sand winning pit, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnaea) sand-winning pit, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnaea) creeps through the upper layer of the sandy bottom to look for a better position, Ijsselmeer (former Zuiderzee), Holland
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Willem Kolvoort / Underwater branches covered in Zebra mussels (Dreissena polymorpha) sand winning pit, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnaea) with Zebra mussel (Dreissena polymorpha) attached to left side, sand winning pit, Holland
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Willem Kolvoort / Freshwater pearl mussels (Margaritifera margaritifera) in fast flowing river, East Latvia
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Simon Colmer / European fingernail clam / Freshwater cockle {Sphaerium corneum} showing siphons, Sussex, UK
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Willem Kolvoort / Swan Mussel (Anodonta cygnaea) with semi-aquatic Weevil. Lake Naarden, Holland. Mussel is filtering water to feed on plankton.
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Willem Kolvoort / Zebra mussels (Dreissena polymorpha) feeding in a canal, Zwolle, Holland
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Willem Kolvoort / Swan Mussel (Anodonta cygnaea) bog at Lake Naarden, Holland. Mussel is filtering water to feed on plankton.
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Willem Kolvoort / Swan mussel {Anodonta cygnaea} Close up of mantle showing tentacles that sift out debris during feeding, Holland
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Willem Kolvoort / Greater european pea clams / Pea mussels (Pisidium amnicum) filter feeding in garden pond, Holland
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} attached to aquatic plants, Lough Keye, Republic of Ireland
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Willem Kolvoort / Greater european pea clams / Pea mussels (Pisidium amnicum) filter feeding in garden pond, Holland
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} one adult and several young filter feeding, Holland.
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} filter feeding, Holland
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} filter feeding, Holland
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} attached to an old steel construction in a new brackish-fresh water lake. Holland
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} filter feeding with tentacles preventing discharge from entering. Peat-bog lake, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnea) filter feeding on plankton with tentacles to prevent debris from entering, Holland
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Willem Kolvoort / Zebra mussels {Dreissana polymorpha} attached to stone on lake bed. Lough Keye, Republic of Ireland
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Willem Kolvoort / Close up of Zebra mussel {Dreissena polymorpha} filter feeding with tentacles preventing discharge from entering. Peat-bog lake, Holland
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Willem Kolvoort / Swan mussel (Anodonta cygnea) male releasing sperm which will be dispersed by water currents to a female, Holland
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Willem Kolvoort / Close up of Zebra mussel {Dreissena polymorpha} filter feeding clearly showing the inlet (left) and outlet (right) openings, with tentacles at the inlet opening to prevent rubbish entering, Deep peat-...
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} attached to a stone on lake floor, Lough Keye, Republic of Ireland
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Willem Kolvoort / Swan mussel (Anodonta cygnea) filter feeding on plankton with tentacles to prevent debris from entering, Holland
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Willem Kolvoort / Close up of Zebra mussel {Dreissena polymorpha} filter feeding clearly showing the inlet (lower) and outlet (upper) openings, with tentacles at the inlet opening to prevent rubbish entering, Deep peat...
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Willem Kolvoort / Zebra mussels {Dreissena polymorpha} attached to a piece of wood on lake floor, Lough Keye, Republic of Ireland
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Willem Kolvoort / Freshwater pearl mussel shell (Margaritifera margaritifera) Natural History Museum, Riga, Latvia
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Willem Kolvoort / Pearls from Freshwater pearl mussel (Margaritifera margaritifera) Natural History Museum, Riga, Latvia
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Willem Kolvoort / Freshwater pearl mussels (Margaritifera margaritifera) These heavily threatened mussels live in a small river in the forests of Latvia. In most european countries they are extinct.
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Staffan Widstrand / Child looking at Freshwater Pearl Mussels (Margaritifera margaritifera) Sweden
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Staffan Widstrand / Freshwater Pearl Mussels (Margaritifera margaritifera) Halsingland, Sweden.
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Kim Taylor / Female Bitterling ovipositing into Mussel while male waits to deposit sperm, sequence 6/6
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Kim Taylor / Female Bitterling inserts ovipositor into siphon of swan mussel {Rhodeus ocellatus}, sequence 5/6
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Kim Taylor / Male Bitterling guides gravid female to Mussel for ovipositing {Rhodeus ocellauts} trailing false ovipositor.
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Kim Taylor / Female Bitterling hangs vertically before ovipositing in Swan mussel {Rhodeus ocellatus}
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Kim Taylor / Gravid female Bitterling and male inspect freshwater Mussel for spawning, seq 1/6 trailing false ovipositor.
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Kim Taylor / Male Bitterling guides gravid female to Mussel for ovipositing, sequence 2/6
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Kim Taylor / Female Bitterling hangs vertically before ovipositing in Swan mussel, sequence 3/6 male in attendance trailing false ovipositor.
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Kim Taylor / Female Bitterling dashs down to insert ovipositor into swan mussel, sequence 4/6 male in attendance trailing false ovipositor.
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Neil Bromhall / Bitterling {Rhodeus sericeus} laying eggs into mussel Europe.
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Neil Bromhall / Bitterling {Rhodeus sericeus} about to lay eggs into mussel Europe.
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Paul Hobson / Swan mussel with foot extended {Anodonta cygnaea} Yorkshire, UK
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Neil Bromhall / Bitterling {Rhodeus sericeus} about to lay eggs into mussel Europe