Robert Thompson / Bladder wrack seaweed {Fucus vesiculosis} Northern Ireland, UK

Ross Hoddinott / Bladder wrack (Fucus vesiculosus) seaweed, Sandymouth bay, Cornwall, UK. March

Ross Hoddinott / Bladder wrack (Fucus vesiculosus) seaweed. Cornwall, UK.

Franco Banfi / Bladder wrack (Fucus sp) exposed at low tide. Vrangel Bay, Primorsky Krai, Russia. August.

Franco Banfi / Bladder wrack (Fucus sp) exposed at low tide. Vrangel Bay, Primorsky Krai, Russia. August.

Nick Upton / Bladder wrack (Fucus vesiculosus) frond from Atlantic Ocean, Cornwall, England, UK. September.

Sue Daly / Bladder wrack (Fucus vesiculosus), Herm, British Channel Islands, June.

Chris Mattison / Bladder wrack (Fucus vesiculosus) Salen, Mull, Scotland, UK, June.

Solvin Zankl / Bladder wrack (Fucus vesiculosus) from Roscoff, France, April. Preserved specimen.

Solvin Zankl / Bladder wrack (Fucus vesiculosus) from Roscoff, France. Preserved specimen.

Solvin Zankl / Bladder wrack (Fucus vesiculosus) Purbeck Marine Wildlife Reserve, Kimmeridge Bay, Dorset, UK, July.

Solvin Zankl / Bladder wrack (Fucus vesiculosus) Purbeck Marine Wildlife Reserve, Kimmeridge Bay, Dorset, UK, July.

Alex Hyde / Bladder Wrack (Fucus vesiculosus) and Channelled Wrack (Pelvetia canaliculata) exposed at low tide in middle-shore zone. Isle of Mull, Scotland, UK. June.

Alex Hyde / Channelled Wrack (Pelvetia canaliculata), Bladder Wrack (Fucus vesiculosus) and Spiral Wrack (Fucus spiralis) seaweeds, exposed at low tide in upper-shore zone. Isle of Mull, Scotland, UK. June.

Chris Mattison / Small bladder wrack plant (Fucus vesiculosus) growing on bare rock, Northumberland, England, UK, May.

Chris Mattison / Bladder wrack (Fucus vesiculosus) on sea shore, Northumberland, England, UK, May.

Nick Upton / Bladder wrack (Fucus vesiculosus) growing on mudflats on the Severn estuary, Somerset, UK, September.

MYN / Carsten Krieger / Flat Periwinkle (Littorna obtusata) on Bladderwrack (Fucus vesiculosus) from tide pool, County Clare, Republic of Ireland, December. Meetyourneighbours.net project

MYN / Carsten Krieger / Bladder Wrack (Fucus vesiculosus) from rock pool, County Clare, Republic of Ireland. December. Meetyourneighbours.net project

Nick Upton / Egg masses of Common whelk (Buccinum undatum) washed up on high water mark alongside dried out Bladder wrack fronds (Fucus vesiculosus), Rhossili, The Gower peninsula, Wales, UK, June.

Nick Upton / Bladder wrack (Fucus vesiculosus) with many air bladders growing low on a rocky shore, Lyme Regis, Dorset, UK, May.

Adrian Davies / Bladder wrack (Fucus vesiculosis), Devon, England, UK, August.

Nick Upton / Turnstones (Arenaria interpres) foraging among pebbles and Bladder wrack (Fucus vesiculosus) on a falling tide, Severn estuary, Somerset, UK, March.

Adrian Davies / Bladder wrack (Fucus vesiculosus), Devon, England, July

Nick Upton / Split level view of Bladder wrack (Fucus vesiculosus) clumps buoyed up underwater by air bladders at mid tide, near Falmouth, Cornwall, UK, August.

Nick Upton / Split level view of Bladder wrack (Fucus vesiculosus) clumps buoyed up underwater by air bladders at mid tide with tufts of epiphytic filamentous brown alga (Elachista fucicola) growing on its fronds,...

Nick Upton / Bladder wrack (Fucus vesiculosus) clumps buoyed up underwater by air bladders at mid tide, near Falmouth, Cornwall, UK, August.

Nick Upton / Tufts of epiphytic filamentous brown alga (Elachista fucicola) growing on fronds of Bladder wrack (Fucus vesiculosus) buoyed up at mid tide, near Falmouth, Cornwall, UK, August.

Nick Upton / Bladder wrack (Fucus vesiculosus) clump buoyed up by air bladders as the tide rises, Crail, Fife, UK, July.

Mark Hamblin / 2020VISION / Seaweed washed up on tide line of beach. Sandyhills Bay, Solway Firth, Dumfries and Galloway, Scotland, UK, March.

Mark Hamblin / 2020VISION / Seaweed washed up on tide line of beach. Sandyhills Bay, Solway Firth, Dumfries and Galloway, Scotland, UK, March.

Niall Benvie / Bladder wrack (Fucus vesiculosus) exposed at low tide, Argyll, Scotland, UK, August

SINCLAIR STAMMERS / Bladderwrack Seaweed (Fucus vesiculosus) close-up of eponumous vesicles.

Ross Hoddinott / Bladder wrack {Fucus vesiculosus} seaweed. Sandymouth bay, Cornwall, UK. August.

Philippe Clement / Close-up of Bladder wrack (Fucus vesiculosus) on beach in Brittany, France

Philippe Clement / Spiral / Flat / Twisted wrack (Fucus vesiculosus) on beach, Brittany, France

Robert Thompson / Bladder wrack seaweed {Fucus vesiculosis} on rock at low tide, Northern Ireland, UK

Robert Thompson / Bladder wrack seaweed {Fucus vesiculosis} Northern Ireland, UK

Robert Thompson / Bladder wrack seaweed {Fucus vesiculosis} on rock at low tide, Northern Ireland, UK

Ross Hoddinott / Bladder wrack {Fucus vesiculosus} seaweed, Cornwall, UK. March

Ross Hoddinott / Bladder wrack {Fucus vesiculosus} showing pneumatocysts that help seaweed to float, Cornwall, UK. March

David Tipling / Bladder wrack seaweed {Fucus vesiculosus} and remains of crab exposed on rocks at low tide, Scotland, UK

Juan Carlos Munoz / Bladder wrack seaweed {Fusca vesiculosus} Shetland Islands, Scotland, UK

Juan Carlos Munoz / Bladder wrack seaweed {Fusca vesiculosus} Shetland Islands, Scotland, UK

Philippe Clement / Seaweed like Bladder wrack (Fucus vesiculosus) and Sea lettuce (Ulva lactuca) exposed at low tide, Brittany, France. May 2008.

Philippe Clement / Seaweed like Bladder wrack (Fucus vesiculosus) and Sea lettuce (Ulva lactuca) exposed at low tide, Brittany, France. May 2008.

Niall Benvie / Bladder Wrack (Fucus vesiculosus) Scotland

Gary K. Smith / Common periwinkles (Littorina Littorea) attached to rock with bladderwrack (Fucus vesiculosus), Norfolk, UK

Niall Benvie / Bladder wrack seaweed {Fucus vesiculosus}. Cromarty Firth, Scotland, UK

Jane Burton / Bladder wrack {Fucus vesiculosus} exposed at low tide. UK.

Jane Burton / Bladder wrack {Fucus vesiculosus} exposed at low tide. UK.

Jane Burton / Bladder wrack {Fucus vesiculosus} exposed at low tide. UK.

Jeff Rotman / Close-up of Bladder wrack seaweed {Fucus vesiculosus} Atlantic, USA

Pete Cairns / Bladder wrack seaweed close-up {Fucus vesiculosus} Scotland, UK

Niall Benvie / Twisted wrack (Fucus vesiculosus). Loch Carron, Scotland, UK, Europe

Niall Benvie / Bladder wrack (Fucus vesiculosus). Loch Carron, Scotland, UK, Europe

Dan Burton / Bladderwrack seaweed at low tide {Fucus vesiculosus} Cornwall UK

Adrian Davies / Bladder wrack seaweed {Fucus vesiculosus} at low tide South England UK

Jeff Foott / Bladder Wrack (Fucus vesiculosus) in autumn, Acadia National Park, Maine

Jeff Foott / Bladder Wrack (Fucus vesiculosus) in autumn, Acadia National Park, Maine

Niall Benvie / Twisted wrack {Fucus spiralis} Bladder wrack {F vesiculosus} seaweeds. Scotland UK

Orsolya Haarberg / Different algaes and seaweeds, including Bladder wrack (Fucus vesiculosus), laying on a beach, covered by snow, Nesna, Helgeland, Norway. February.

Richard Herrmann / Bladder Wrack (Fucus vesiculosus), Bay of Biscay, France

Richard Herrmann / Bladder Wrack (Fucus vesiculosus) and Sea Thong (Himanthalia elongata), Bay of Biscay, France

Konrad Wothe / Bladder wrack (Fucus vesiculosus) in intertidal zone, Atlantic Ocean, Republic of Ireland. August.

Alex Mustard / Seaweed including Bladder wrack (Fucus vesiculosus) egg wrack (Ascophyllum nodosum; serrated wrack (Fucus serratus) grows around the edge of a rockpool. Looe, Cornwall, England, United Kingdom. Englis...