Jack Dykinga / Burrowing owl (Athene cunicularia) chick aged 10 weeks with dragonfly in beak, practising hunting. Marana, Sonoran Desert, Arizona, USA. July.

Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering underwater, Cumbria, England, UK, September. Did you know? The latin name for this genus 'Ranunculus' comes from the Latin for 'Litte...

Graham Eaton / Underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / A split-level image of a mountain stream, in autumn, with water droplets on lens, Nant Ffrancon Valley, Snowdonia NP, Gwynedd, Wales, UK, October

Graham Eaton / Underwater view of a rapidly flowing mountain stream, Snowdonia NP, Gwynedd, Wales, UK, November

Christophe Courteau / Timber washed onto the shore by the strong arctic currents. There are no trees on Spitzbergen, all the wood comes from the Siberian Coast, Poolepynten, Spitzbergen, Svalbard, Norway, July 2011

Jerry Monkman / A kayaker plays in a hole in Tariffville Gorge on the Farmington River in Tariffville, Connecticut. Class III whitewater. May 2007. Model released.

Wild Wonders of Europe / Ruiz / Krinice River flowing past rock faces almost at right angles, Dlouhy Dul, Ceske Svycarsko / Bohemian Switzerland National Park, Czech Republic, September 2008

Wild Wonders of Europe / Ruiz / Krinice River flowing past rock faces, Dlouhy Dul, Ceske Svycarsko / Bohemian Switzerland National Park, Czech Republic, September 2008

Wild Wonders of Europe / Lundgren / Whirlpool in the sea, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / The fastest current / Maelstrom in the world, Salstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / The current running out to sea, Saltstraumen, Bod, Norway, October 2008

Wild Wonders of Europe / Lundgren / Klas Malmberg with torch drifting quickly through underwater crevice, Sundstrmmen, Bod, Norway, October 2008

Fred Bavendam / Variety of small reef fish swimming in the currents above a Hard Coral reef with Sponges, Ascidians, and a blue Sea Star, Manado, North Sulawesi, Indonesia

Fred Bavendam / Feather Star (Oxycomanthus bennetti) clinging to a coral prominence where it can feed in the currents, Milne Bay, Papua New Guinea

Fred Bavendam / Sea Goldie (Pseudanthias squamipinnis) group feeding in the currents on a steep slope with Soft Corals, Crinoids and Gorgonians, Kimbe Bay, Papua New Guinea

Fred Bavendam / Sweeper (Parapriacanthus sp) and Basslet school (Pseudanthias sp) feeding in the currents above a coral plate covered with Crinoids, Papua New Guinea

Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering underwater, Cumbria, England, UK, September.

Nick Turner / Dangerous currents warning information sign at Caerfai Bay on the Pembrokeshire Coast Path, Wales, June 2009.

Graham Eaton / The underwater landscape within Afon Nant Peris, a mountain stream, Llanberis, Snowdonia NP, Gwynedd,Wales, UK, March

Graham Eaton / An underwater view of a mountain stream, showing water turbulence around rocks, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Long underwater exposure of a mountain stream, with Green algae (Chlorophyceae sp.) moving in the current, River Ogwen, Snowdonia NP, Gwynedd, Wales, UK, October 2009. Highly commended in Botanical Br...

Graham Eaton / View of the underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK

Graham Eaton / An underwater view of a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Underwater view of a mountain stream, Snowdonia NP, Gwynedd, Wales, UK, November

Bryan and Cherry Alexander / Black browed albatross (Thalassarche melanophrys) playing in the wind currents behind boat. Southern Ocean, Antarctica.

Bryan and Cherry Alexander / Black browed albatross (Thalassarche melanophrys) playing in the wind currents behind boat. Southern Ocean, Antarctica.

Barrie Britton / Eider (Somateria mollissima) flock roosting in a polynya, an ice hole kept open in the frozen sea by tidal currents. Belcher Islands, Hudson Bay, Canada. Picture taken during filming for the BBC "Pla...

Jerry Monkman / A kayaker plays in a hole in Tariffville Gorge on the Farmington River in Tariffville, Connecticut. Class III whitewater. May 2007. Model released.

Jerry Monkman / A kayaker plays in a hole in Tariffville Gorge on the Farmington River in Tariffville, Connecticut. Class III whitewater. May 2007. Model released.

Jerry Monkman / A kayaker plays in a hole in Tariffville Gorge on the Farmington River in Tariffville, Connecticut. Class III whitewater. May 2007. Model released.

Tim Laman / Split level view of a diver inspects a soft coral growing on a fallen tree trunk, in a passage between Waigeo and Gam Islands. This unique area is protected from waves but experiences high currents w...

Tim Laman / Split level view of a diver inspecting a soft coral growing, in a passage between Waigeo and Gam Islands. This unique area is protected from waves but experiences high currents which allows soft coral...

Tim Laman / Split level view of a diver inspecting a soft coral, in a passage between Waigeo and Gam Islands. This unique area is protected from waves but experiences high currents which allows soft corals to flo...

Tim Laman / Salp (Salpidae) floating on the currents of Cebu island, Philippines.

Wild Wonders of Europe / Lundgren / Whirlpools in the water, Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Whirlpools of Saltstraumen, Bodö, Norway, October 2008

Wild Wonders of Europe / Lundgren / Whirpools in the sea, Saltstraumen, Bodö, Norway, October 2008

Chris Newbert / Soft Coral (Sinularia sp) moving in ocean currents, Indonesia

Francis Abbott / Bluering angelfish (Pomacanthus annularis) with a shoal of Luminous cardinalfish / Glassfish (Rhabdamia gracilis) shelter within a small cave from the strong currents that sweep Ko Tachai island in th...

Francis Abbott / Bluering angelfish (Pomacanthus annularis) with a shoal of Luminous cardinalfish / Glassfish (Rhabdamia gracilis) shelter within a small cave from the strong currents that sweep Ko Tachai island in th...

Albert Lleal / Common European Scorpion (Buthus occitanus) SEM close-up view of skin showing a trichobothrium, an elongate setae, present in the arachnids, that functions in the detection of airborne vibrations and...

John & Mary-Lou Aitchison / Coconut {Cocos nucifera} washed ashore on North Uist, Scotland

Sue Flood / Polyna (hole in ice kept open by currents) with eider ducks in Belcher Islands near Sanikiluaq, Hudson Bay, Canada. 2005

Sue Flood / Polyna (hole in ice kept open by currents) with eider ducks in Belcher Islands near Sanikiluaq, Hudson Bay, Canada. 2005

Willem Kolvoort / Swan mussel (Anodonta cygnea) male releasing sperm which will be dispersed by water currents to a female, Holland

Michael Pitts / Aerial view of islands in The Bahamas showing water currents, Caribbean

Michael Pitts / Aerial view of islands in The Bahamas showing water currents, Caribbean

Jose B. Ruiz / Neptune grass waving in underwater currents {Posidonia oceanica} Mediterranean

Fred Bavendam / Frilled Sea Anemone (Metridium sp) growing on shallow rocks near the south end of Browning Pass affected by ocean currents, British Columbia, Canada

Paul D Stewart / Illustration of Madagascan Pipevine Swallowtail (Pharmacophagus antenor / Batthus philenor, Drury 1773). Strong late 18th Century illustration with contemporary colouring following its discovery. As a...

Paul D Stewart / Woodcut of Common electric ray (Torpedo torpedo) with old colouring. From Conrad Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. The torpedo or electric ray had been well know by...

Nick Upton / Velvet horn / Spongeweed (Codium tomentosum) fronds bent over by water currents as the tide rises, Wembury, Devon, UK, August.

Tui De Roy / The chilly waters around Roca Redonda in Galapagos are caused by upwelling currents from the ocean's depths, Ecuador