Nick Turner / Man lifting fluorescent light tubes at a recycling centre, Stroud, Gloucestershire, UK, February 2008.
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Alex Mustard / Yellow tube sponge (Aplysina fistularis) top view of tubes with water swirling around them, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.
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Christophe Courteau / Calcerous tubes of Keelworm {Pomatoceros lamarcki} on rock Brittany France
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David Woodfall / Sessile Oak (Quercus Petraea) tree saplings planted in plastic tubes by conservation volunteers to increase the size of oak woodland in Gilfach farm Nature Reserve, Radnorshire Wildlife Trust, Powys,...
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David Woodfall / Sessile Oak (Quercus Petraea) tree saplings planted in plastic tubes by conservation volunteers to increase the size of oak woodland in Gilfach farm Nature Reserve, Radnorshire Wildlife Trust, Powys,...
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David Woodfall / Sessile Oak (Quercus Petraea) tree saplings planted in plastic tubes by conservation volunteers to increase the size of oak woodland in Gilfach farm Nature Reserve, Radnorshire Wildlife Trust, Powys,...
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David Woodfall / Sessile Oak (Quercus Petraea) tree saplings planted in plastic tubes by conservation volunteers to increase the size of oak woodland in Gilfach farm Nature Reserve, Radnorshire Wildlife Trust, Powys,...
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Solvin Zankl / GEOMAR / Polychaete worm (Eunice norvegica) calcifies over its parchment tubes of Lopheia pertusa adding strength to the coral skeleton and providing protection to the worm, from Trondheimfjord, North Atlant...
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Nick Upton / Four Sea squirts (Ascidiella scabra) attached to boulder in a rockpool alongside serpulid worm tubes, Bryozoans, Barnacles and Red algae low on the shore, Helford River, Cornwall, UK, August.
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Nick Upton / Star ascidian colony (Botryllus schlosseri) growing on rock exposed on a low spring tide alongside serpulid worm tubes, near Falmouth, Cornwall, UK, August.
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Nick Upton / Four Sea squirts (Ascidiella scabra) attached to boulder in a rockpool alongside serpulid worm tubes, Star ascidians, Bryozoans, Barnacles and Red algae low on the shore, Helford River, Cornwall, UK,...
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Nick Upton / Wide angle view of Sand mason worm (Lanice conchilega) tubes reinforced with sand and shell fragments exposed on a low spring tide on a sandy shore, with the sea in the background, Rhossili, The Gower...
