Mateusz Piesiak / Black-headed Gull (Chroicocephalus ridibundus) flock in flight a dawn, Barycz Valley Landscape Park, Poland. Emotion'Ailes Photography Competition 2021 Category Winner - Artistic.

SCOTLAND: The Big Picture / Close up of a colony of Jewel anemones (Corynactis viridis) Scotland, UK, October.

Sven Zacek / Frozen bog pool system, aerial view. Endla Nature Reserve, Jogevamaa, Central Estonia. December 2016.

Solvin Zankl / By-the-wind sailor (Velella velella) colony. Sargasso Sea, Bermuda.

Andy Rouse / Galapagos sea lion (Zalophus wollebaeki) silhouetted at sunset, Galapagos.

Peter Cairns / Twilight over Flakstad beach, Lofoten, Norway. February 2014.

Peter Cairns / Twilight over Flakstad beach, Lofoten, Norway. February 2014.

Ole Jorgen Liodden / Svalbard reindeer (Rangifer tarandus platyrhyncus) feeding at sunset, Spitsbergen, Svalbard, Norway, April.

Steven Kazlowski / Photographer in front of Northern lights / Aurora borealis glowing brightly over the frozen eastern Beaufort Sea, Arctic National Wildlife Refuge, Alaska Model released.

Tom Gilks / Nyiragongo volcano lava lake, Virungas National Park, Democratic Republic of Congo February 2015.

Alex Hyde / Alpine meadow, Nordtirol, Austrian Alps, July 2014.

Christophe Courteau / Light of the Creac'h Lighthouse at night. Ile d'Ouessant / Ushant, Finistere, Brittany, France, September 2011.

Jack Dykinga / Sun shining through mesquite bosque forest with lush winter rain-fed grasses covering the forest floor at sunset, Catalina State Park, Arizona. February 2014.

Ross Hoddinott / The Northern Lights / Aurora Borealis over a river, Vik, Iceland. February 2014.

Sandra Bartocha / Silver birch (Betula pendula) and Scots pine (Pinus sylvestris) trunks in snow, Muritz-National Park, Germany, January.

Juergen Freund / Bioluminescent fungi (Omphalotus nidiformis / Pleurotus nidiformis) glowing on tree trunk in rainforest at night, Atherton Tablelands, Queensland, Australia,

Jeff Vanuga / Guardian riding Camargue horse through water at sunrise, Camargue, Bouches du Rhone, France, May 2013.

Ingo Arndt / Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.

Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.

Ross Hoddinott / RF- Beech (Fagus) and Bluebell (Hyacinthoides non-scripta) woodland at Lanhydrock, Cornwall. UK. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / RF- Adult male Rajah Brooke's Birdwing butterfly (Trogonoptera brookiana) basking in pool of sunlight. Dipterocarp rainforest, Danum Valley, Sabah, Borneo. (This image may be licensed either as rights...

Alex Mustard / Orange clarion angelfish (Holacanthus clarionensis) head portrait, Socorro Island, Baja California, Mexico, Pacific Ocean.

Alex Mustard / Fluorescent coral (Lobophyllia hemprichii) at night on a coral reef in blue light. Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Fluorescent coral (Pocillopora sp.) at night on a coral reef in blue light, with the lights from a resort jetty behind, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Fluorescent coral (Diploastrea heliopora) at night on a coral reef in blue light, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Lobophyllia sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Symphyllia sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence in Mushroom coral (Fungiidae) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Alex Mustard / Coral fluorescence (Acropora sp.) at night, under blue light, on a coral reef, Laamu Atoll, Maldives, Indian Ocean.

Lewis Jefferies / Jewel anemones (Corynactis viridis) feeding, Porthkerris, Cornwall, English Channel, UK. June.

Lewis Jefferies / Compass jellyfish (Chrysaora hysoscella) feeding on plankton near surface, Falmouth, English Channel, Cornwall, UK. July.

SCOTLAND: The Big Picture / Jewel anemones (Corynactis viridis), green form, close up, Bressay, Shetland, Scotland, North Atlantic Ocean, UK.

SCOTLAND: The Big Picture / Queen scallop (Aequipecten opercularis) with hydroids adorning its shell, Whiteness, Shetland, Scotland, North Atlantic Ocean, UK.

SCOTLAND: The Big Picture / Sea slugs (Elysia viridis) feeding on Green sea fingers (Codium fragile), an invasive species usually found in the Pacific Ocean, Churchill Barriers, Orkney Islands, Scotland, North Atlantic Ocean, UK...

SCOTLAND: The Big Picture / Nudibranch (Polycera quadrilineata) on a blade of kelp, Spiggy, Shetland, Scotland, North Atlantic Ocean, UK.

David Fleetham / Sixbar wrasse (Thalassoma hardwicke) portrait, Fiji, Pacific Ocean.

SCOTLAND: The Big Picture / Aurora borealis in the evening sky over Ben Ledi from Buchlyvie, The Trossachs National Park, Stirling, Scotland. September, 2020.

Nick Upton / Common blue damselfly (Enallagma cyathigerum) resting on Common cotton-grass (Eriophorum angustifolium) in a freshwater marsh, Kenfig National Nature Reserve, Glamorgan, Wales, UK, June.

Robert Thompson / Yellow stagshorn fungus (Calocera viscosa) growing in woodland, Tollymore Forest, County Down, Northern Ireland. September.

Georgette Douwma / RF - Semicircle angelfish (Pomacanthus semicirculatus) composite image on black background, Indonesia. (This image may be licensed either as rights managed or royalty free.)

Georgette Douwma / French angelfish (Pomacanthus paru) composite image on black background, Bonaire, Netherlands Antilles, Caribbean.

Georgette Douwma / Blue-ringed octopus (Hapalochlaena sp.) on black background, Lembeh Strait, North Sulawesi, Indo-Pacific species.

Georgette Douwma / Blue-ringed octopus (Hapalochlaena sp.) on black background, Lembeh Strait, North Sulawesi, Indo-Pacific.