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    • yellow-green alga
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Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January.
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Jeff Vanuga / Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January.
Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
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Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
Mysid on algae (Fucus serratus), Shetland Isles, Scotland, UK, June.
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SCOTLAND: The Big Picture / Mysid on algae (Fucus serratus), Shetland Isles, Scotland, UK, June.
Funnelweed (Padina gymnospora) and Green Algae (Halimeda sp.). West Papua, Indonesia. Indo-West Pacific.
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Georgette Douwma / Funnelweed (Padina gymnospora) and Green Algae (Halimeda sp.). West Papua, Indonesia. Indo-West Pacific.
Red-eared slider (Trachemys scripta elegans) in blue-green algae (Woronichinia naegeliana). Microcystin produced is toxic to wildlife and humans. Maryland. October 2018.
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John Cancalosi / Red-eared slider (Trachemys scripta elegans) in blue-green algae (Woronichinia naegeliana). Microcystin produced is toxic to wildlife and humans. Maryland. October 2018.
Pool coloured red from algae that have been fertilized by seabird guano on the Farne Islands, Northumberland, England, UK. July.
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Ashley Cooper / Pool coloured red from algae that have been fertilized by seabird guano on the Farne Islands, Northumberland, England, UK. July.
Weedy seadragon (Phyllopteryx taeniolatus) male carries eggs through a kelp forest (Macrocystis pyrifera) in Tasmania, Australia. Tasmania is the only part of Australia with giant kelp forests. The ke...
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Alex Mustard / Weedy seadragon (Phyllopteryx taeniolatus) male carries eggs through a kelp forest (Macrocystis pyrifera) in Tasmania, Australia. Tasmania is the only part of Australia with giant kelp forests. The ke...
View upwards through a giant kelp forest (Macrocystis pyrifera). Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
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Alex Mustard / View upwards through a giant kelp forest (Macrocystis pyrifera). Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
Detail of the gas bladders and fronds of Giant kelp (Macrocystis pyrifera) plant. Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
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Alex Mustard / Detail of the gas bladders and fronds of Giant kelp (Macrocystis pyrifera) plant. Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
Detail of the gas bladders and fronds of Giant kelp (Macrocystis pyrifera) plant. Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
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Alex Mustard / Detail of the gas bladders and fronds of Giant kelp (Macrocystis pyrifera) plant. Santa Barbara Island, the Channel Islands, California, United States of America. East Pacific Ocean
RF - View through giant kelp (Macrocystis pyrifera) forest. Santa Barbara Island, Channel Islands. Los Angeles, California, United States of America. North East Pacific Ocean. (This image may be licen...
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Alex Mustard / RF - View through giant kelp (Macrocystis pyrifera) forest. Santa Barbara Island, Channel Islands. Los Angeles, California, United States of America. North East Pacific Ocean. (This image may be licen...
Yellow-spotted salamander eggs (Ambystoma maculatum) showing symbiosis with green algae, New Brunswick, Canada, May 2015.
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Nick Hawkins / Yellow-spotted salamander eggs (Ambystoma maculatum) showing symbiosis with green algae, New Brunswick, Canada, May 2015.
Intertidal rocks covered in seaweeds, including, brown algae: at top Toothed wrack (Fucus serratus) and on the left Bifurcaria bifurcata. Red algae: middle and bottom right Pepper dulse (Osmundea pinn...
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Solvin Zankl / Intertidal rocks covered in seaweeds, including, brown algae: at top Toothed wrack (Fucus serratus) and on the left Bifurcaria bifurcata. Red algae: middle and bottom right Pepper dulse (Osmundea pinn...
Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by Cyano bacteria, Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by cyano bacteria, in Doublet Pool, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by cyano bacteria, in Doublet Pool, Yellowstone National Park, Wyoming, USA, July.
Colourful patterns formed by cyano bacteria, in Doublet Pool, Yellowstone National Park, Wyoming, USA, July.
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Mark MacEwen / Colourful patterns formed by cyano bacteria, in Doublet Pool, Yellowstone National Park, Wyoming, USA, July.
Sargassum fish (Histrio histrio) near the surface on floating Sargassum seaweed, Raja Ampat, West Papua, Indonesia, Pacific Ocean.
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Solvin Zankl / Sargassum fish (Histrio histrio) near the surface on floating Sargassum seaweed, Raja Ampat, West Papua, Indonesia, Pacific Ocean.
Sargassum fish (Histrio histrio) near the surface on floating Sargassum seaweed, Raja Ampat, West Papua, Indonesia, Pacific Ocean.
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Solvin Zankl / Sargassum fish (Histrio histrio) near the surface on floating Sargassum seaweed, Raja Ampat, West Papua, Indonesia, Pacific Ocean.
Sea Lettuce (Ulva lactuca) from tide pool, County Clare, Republic of Ireland, December. Meetyourneighbours.net project
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MYN / Carsten Krieger / Sea Lettuce (Ulva lactuca) from tide pool, County Clare, Republic of Ireland, December. Meetyourneighbours.net project
An epizoic brown alga (Scytosiphon lomentaria) growing on a Common Limpet (Patella vulgata) in a rockpool, Polzeath, Cornwall, UK, April.
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Nick Upton / An epizoic brown alga (Scytosiphon lomentaria) growing on a Common Limpet (Patella vulgata) in a rockpool, Polzeath, Cornwall, UK, April.
Giant's Causeway, UNESCO World Heritage Site, County Antrim, Northern Ireland, Europe, June 2011
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Juan Carlos Munoz / Giant's Causeway, UNESCO World Heritage Site, County Antrim, Northern Ireland, Europe, June 2011
Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
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Will Watson / Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
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Will Watson / Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
Spreading Earth-moss (Aphanorrhegma patens) and Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
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Will Watson / Spreading Earth-moss (Aphanorrhegma patens) and Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
Spreading Earth-moss (Aphanorrhegma patens) and Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
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Will Watson / Spreading Earth-moss (Aphanorrhegma patens) and Yellow-green alga (Botrydium granulatum) on margin of glacial kettle-hole pond, Herefordshire, England, UK, October
Lichen (Xanthoria parietina) found growing on a twig, showing mass of apothecia (cup-shaped fruiting bodies). Peak District National Park, UK. January.
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Alex Hyde / Lichen (Xanthoria parietina) found growing on a twig, showing mass of apothecia (cup-shaped fruiting bodies). Peak District National Park, UK. January.
Carragheen / Irish moss seaweed (Chondrus crispus) exposed at low tide, Isle of Skye, Hebrides, Scotland, August
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Laurie Campbell / Carragheen / Irish moss seaweed (Chondrus crispus) exposed at low tide, Isle of Skye, Hebrides, Scotland, August
Sponge (Aplysina aerophoba) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
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Roberto Rinaldi / Sponge (Aplysina aerophoba) amongst mass of invasive algae (Caulerpa taxifolia) with Rainbow wrasse fish (Coris julis), Strait of Messina, Southern Italy
Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy
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Roberto Rinaldi / Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy
Diver viewing Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy
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Roberto Rinaldi / Diver viewing Yellow fan coral / Seafan (Paramuricea clavata) amongst mass of invasive algae (Caulerpa taxifolia), Strait of Messina, Southern Italy
RF- Grey seal (Halichoerus grypus) among kelp. Lundy Island, Bristol Channel, England, UK, May. Grey seals can dive up to 70 metres and stay underwater for 30 minutes.
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Alex Mustard / 2020VISION / RF- Grey seal (Halichoerus grypus) among kelp. Lundy Island, Bristol Channel, England, UK, May. Grey seals can dive up to 70 metres and stay underwater for 30 minutes.
Algal bloom on pond with three fallen leaves, England, UK
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Stephen Dalton / Algal bloom on pond with three fallen leaves, England, UK
RF- Garibaldi fish (Hypsypops rubicundus) in kelp forest, California, USA. Pacific coast. (This image may be licensed either as rights managed or royalty free.)
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Juergen Freund / RF- Garibaldi fish (Hypsypops rubicundus) in kelp forest, California, USA. Pacific coast. (This image may be licensed either as rights managed or royalty free.)
Plant life growing below and above tide line - from bottom: seaweed in inter-tidal zone, then black lichen, yellow lichen and green Samphire. Co Kerry, Republic of Ireland.
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Tim Edwards / Plant life growing below and above tide line - from bottom: seaweed in inter-tidal zone, then black lichen, yellow lichen and green Samphire. Co Kerry, Republic of Ireland.
Various species of algae, (predominately Lobophora variegata), on seabed at a depth of about 3 metres, Fuerteventura, Canary Islands, Atlantic Ocean.
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Sergio Hanquet / Various species of algae, (predominately Lobophora variegata), on seabed at a depth of about 3 metres, Fuerteventura, Canary Islands, Atlantic Ocean.
Abundance of zooplankton within cold algal community at heart of Cromwell Current upwelling, with floating Gulfweed (Sargassaceae). Galapagos Islands, Ecuador. Pacific Ocean.
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Tui De Roy / Abundance of zooplankton within cold algal community at heart of Cromwell Current upwelling, with floating Gulfweed (Sargassaceae). Galapagos Islands, Ecuador. Pacific Ocean.
Red sun star (Asterias cumingii) and Chocolate chip seastar (Nidorellia armata) amongst Gulfweed (Sargassaceae). Galapagos Islands, Ecuador. Pacific Ocean.
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Tui De Roy / Red sun star (Asterias cumingii) and Chocolate chip seastar (Nidorellia armata) amongst Gulfweed (Sargassaceae). Galapagos Islands, Ecuador. Pacific Ocean.
Reticulated cowry (Cypraea maculifera) resting on algae covered rock, Hawaii, Pacific Ocean.
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David Fleetham / Reticulated cowry (Cypraea maculifera) resting on algae covered rock, Hawaii, Pacific Ocean.
Bootlace weed (Chorda filum) on seabed in clear, shallow sea, Rhosneigr, Anglesey, Wales, Irish Sea, UK. July.
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Graham Eaton / Bootlace weed (Chorda filum) on seabed in clear, shallow sea, Rhosneigr, Anglesey, Wales, Irish Sea, UK. July.
Different algaes and seaweeds, including Bladder wrack (Fucus vesiculosus), laying on a beach, covered by snow, Nesna, Helgeland, Norway. February.
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Orsolya Haarberg / Different algaes and seaweeds, including Bladder wrack (Fucus vesiculosus), laying on a beach, covered by snow, Nesna, Helgeland, Norway. February.
Focus stacked, inverted image of Diatoms on a microscope slide. Diatoms are single-celled algae which produce approximately 25% of the oxygen we breathe as well as being responsible for approximately...
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Alex Hyde / Focus stacked, inverted image of Diatoms on a microscope slide. Diatoms are single-celled algae which produce approximately 25% of the oxygen we breathe as well as being responsible for approximately...
Sunflower seastar (Pycnopodia helianthoides), juvenile, feeding on algae growing on kelp (Laminariales), Prince William Sound, Alaska, USA, Pacific Ocean.
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Shane Gross / Sunflower seastar (Pycnopodia helianthoides), juvenile, feeding on algae growing on kelp (Laminariales), Prince William Sound, Alaska, USA, Pacific Ocean.
Northern kelp crab (Pugettia producta) clinging to kelp (Laminariales), with Eelgrass (Zostera marina) in background, Prince William Sound, Alaska, USA, Pacific Ocean.
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Shane Gross / Northern kelp crab (Pugettia producta) clinging to kelp (Laminariales), with Eelgrass (Zostera marina) in background, Prince William Sound, Alaska, USA, Pacific Ocean.
Diverse array of algae species including Sargassum weed (Sargassum horneri), Kelp (Laminariales), Sea lettuce (Ulva lactuca) on shallow reef with juvenile Pollock (Pollachius pollachius) and Ballan wr...
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Lewis Jefferies / Diverse array of algae species including Sargassum weed (Sargassum horneri), Kelp (Laminariales), Sea lettuce (Ulva lactuca) on shallow reef with juvenile Pollock (Pollachius pollachius) and Ballan wr...
Air bladders lifting strands of giant kelp (Macrocystis pyrifera) towards the surface, off Santa Barbara Island, California, USA, Pacific Ocean. Nature's Best Photography International Awards 2023 - H...
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David Fleetham / Air bladders lifting strands of giant kelp (Macrocystis pyrifera) towards the surface, off Santa Barbara Island, California, USA, Pacific Ocean. Nature's Best Photography International Awards 2023 - H...
Snakelocks anemone (Anemonia viridis) growing on a stalk of Eelgrass (Zostera marina) on the seabed, Isle of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean. August.
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Alex Mustard / Snakelocks anemone (Anemonia viridis) growing on a stalk of Eelgrass (Zostera marina) on the seabed, Isle of Coll, Inner Hebrides, Scotland, UK, Atlantic Ocean. August.
Juvenile Pollack (Pollachius pollachius) swimming through shallow water rich with seaweed growth: Wireweed (Sargassum muticum and Sea lettuce (Ulva lactuca), Pendennis Head, Cornwall, UK, English Chan...
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Alex Mustard / Juvenile Pollack (Pollachius pollachius) swimming through shallow water rich with seaweed growth: Wireweed (Sargassum muticum and Sea lettuce (Ulva lactuca), Pendennis Head, Cornwall, UK, English Chan...
Shallow water seaweeds (including sea lettuce: Ulva spp. and serrated wrack: Fucus serratus) carpet the seabed. Looe, Cornwall, England, United Kingdom. British Isles. English Channel, North East Atla...
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Alex Mustard / Shallow water seaweeds (including sea lettuce: Ulva spp. and serrated wrack: Fucus serratus) carpet the seabed. Looe, Cornwall, England, United Kingdom. British Isles. English Channel, North East Atla...
Split level shot of kelp and other 'seaweeds' partly exposed at low tide, with coniferous forest in the background. Seen in this photograph are the following: Turkish washcloth (Mastocarpus pa...
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David Hall / Split level shot of kelp and other 'seaweeds' partly exposed at low tide, with coniferous forest in the background. Seen in this photograph are the following: Turkish washcloth (Mastocarpus pa...
Sugar kelp / sea belt / Devil's apron (Saccharina latissima / Laminaria saccharina) brown alga seaweed washed ashore on rocky beach, Normandy, France, June
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Philippe Clement / Sugar kelp / sea belt / Devil's apron (Saccharina latissima / Laminaria saccharina) brown alga seaweed washed ashore on rocky beach, Normandy, France, June
Gutweed (Ulva intestinalis / Enteromorpha intestinalis), sea lettuce (Ulva lactuca) and spiral wrack / flat wrack (Fucus spiralis) washed on beach, Normandy, France, June
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Philippe Clement / Gutweed (Ulva intestinalis / Enteromorpha intestinalis), sea lettuce (Ulva lactuca) and spiral wrack / flat wrack (Fucus spiralis) washed on beach, Normandy, France, June
Spiral wrack / flat wrack (Fucus spiralis), brown alga seaweed washed ashore on rocky beach, Normandy, France, June
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Philippe Clement / Spiral wrack / flat wrack (Fucus spiralis), brown alga seaweed washed ashore on rocky beach, Normandy, France, June
Thongweed / sea thong / sea spaghetti (Himanthalia elongata / Fucus elongatus), brown alga seaweed washed ashore on rocky beach, Normandy, France, June
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Philippe Clement / Thongweed / sea thong / sea spaghetti (Himanthalia elongata / Fucus elongatus), brown alga seaweed washed ashore on rocky beach, Normandy, France, June
Japanese wireweed (Sargassum muticum), invasive brown seaweed originally from Japan, Normandy, France, June
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Philippe Clement / Japanese wireweed (Sargassum muticum), invasive brown seaweed originally from Japan, Normandy, France, June
Toothed wrack / serrated wrack (Fucus serratus) seaweed of the north Atlantic Ocean, Normandy, France, June
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Philippe Clement / Toothed wrack / serrated wrack (Fucus serratus) seaweed of the north Atlantic Ocean, Normandy, France, June
Bifurcaria bifurcata, brown alga seaweed washed ashore on rocky beach, Normandy, France, June
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Philippe Clement / Bifurcaria bifurcata, brown alga seaweed washed ashore on rocky beach, Normandy, France, June