David Fleetham / Guineafowl puffer fish (Arothron meleagris) inflated, displaying defensive behaviour over coral reef, Yap, Indo Pacific, Micronesia.

David Fleetham / Man-of-war fish (Nomeus gronovi) juvenile reflected at sea surface, next to Portuguese man-of-war (Physalia utriculus / physalis) Pacific Ocean, Hawaii, USA.

David Fleetham / Florida manatee (Trichechus manatus latirostris) with Bluegill sunfish (Lepomis macrochirus) shoal, one fish eye to eye with manatee, Three Sisters Spring, Crystal River, Florida, USA.

David Fleetham / Florida manatees (Trichechus manatus latirostris) subspecies of the West Indian manatee, large group gather at Three Sisters Spring, Crystal River, Florida, USA.

David Fleetham / Atlantic long arm octopus (Octopus defilippi) blending into sand sea floor with tentacles curled in, off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Cardinalfish (Apogon sp.) two inch fry swimming vertically with head down at night, 2000+ feet above sea bottom, off Yap, Indo Pacific, Micronesia.

David Fleetham / Idyllic view of shallow lagoon with mid-day clouds over the island of Yap, Indo Pacific, Micronesia.

David Fleetham / Atlantic spotted dolphins (Stenella frontalis) Western Atlantic Ocean, Bahamas, Carribean.

David Fleetham / Atlantic spotted dolphin (Stenella frontalis) two, one dolphin with Remora (Remora sp.) attached to its side, Western Atlantic Ocean, Bahamas, Caribbean.

David Fleetham / Whitetip reef shark (Triaenodon obesus) resting in rock crevice on reef, one of a few sharks that can remain motionless for short periods, Pacific Ocean, Hawaii, USA.

David Fleetham / Zebra / Leopard shark (Stegostoma fasciatum) egg case on shingle seabed, Indo Pacific, Yap, Mocronesia.

David Fleetham / Grey reef shark (Carcharhinus amblyrhynchos) with endemic Hawaiian cleaner wrasse (Labroides phthirophagus) in mouth, Pacific Ocean, Hawaii, USA.

David Fleetham / Hawaiian morwong (Goniistius vittatus) pair with comical lips, endemic fish, very unusual to see, Pacific Ocean, off Kauai, Hawaii, USA.

David Fleetham / Longjaw squirrelfish (Sargocentron spiniferum) in front of reef, Pacific Ocean, Hawaii, USA.

David Fleetham / Gray chub (Kyphosus sandwicensis) Pacific Ocean, Hawaii, USA.

David Fleetham / Slate pencil sea urchin (Heterocentrotus mammillatus) close up of shell and spines, Pacific Ocean, Hawaii, USA.

Bernard Castelein / Landscape of fen and clouds, Klein Schietveld, Brasschaat, Belgium, May 2021.

Bernard Castelein / Adult male Great spotted woodpecker (Dendrocopos major) at water drinking, Brasschaat, Belgium, June.

Bernard Castelein / Female Greenfinch (Carduelis chloris) drinking, Brasschaat Belgium, July.

Bernard Castelein / Song Trush (Turdus philomelos) collecting nesting material, Brasschaat, Belgium, May.

Bernard Castelein / Large red damselfly (Pyrrhosoma nymphula) mating and female laying eggs in vegetation, under the waterline, Brasschaat, Belgium, June.

David Fleetham / Yellow boxfish (Ostracion cubicus) with ghost shrimp (Palaemonetes sp.) resting on head, Celebes Sea, Sipidan Island, Malaysia.

David Fleetham / Depressed spindle cowrie (Hiatavolva depressa) inhabits sea whip coral (Alertigorgia sp), Celebes Sea, Mabul Island, Malaysia.

David Fleetham / Minute / Dwarf filefish (Rudarius minutus) just over an inch long as an adult, Celebes Sea, Mabul Island, Malaysia.

David Fleetham / Harlequin / Clown / Many spotted sweetlips fish (Plectorhinchus chaetodonoides) swims in erratic pattern mimicking spanish dancer nudibranch to deter predators, Celebes sea, Mabul Island, Malaysia.

David Fleetham / Porkfish (Anisotremus virginicus) native to the western Atlantic Ocean, in reef off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Ocellate swimming crab (Portunus sebae) on sandy sea floor, photographed off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Slender filefish (Monacanthus tuckeri) camouflaged against the coral reef, off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Yellow stingray (Urolophus jamaicensis) close up of tail barb against sandy sea floor, off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Giant marine hermit crab (Petrochirus diogenes). close up of green eyes on stalks and shell encrusted with limpets, off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Spotted scorpionfish (Scorpaena plumieri) one of the largest and most common of the scorpionfishes in the Atlantic and Caribbean. Camouflaged against background on sea floor, off Singer Island, Atlant...

David Fleetham / Rainbow / False mantis shrimp (Pseudosquilla ciliata) widespread in the tropical Indo-Pacific region and in both the western and eastern Atlantic Ocean, photographed off Singer Island, Atlantic Ocean,...

David Fleetham / Yellow stingray (Urolophus / Urobatus jamaicensis) with reticulated patterning, swimming over sandy sea bed off Singer Island, Atlantic Ocean, Florida, USA.

David Fleetham / Blackfin barracuda / Chevron barracuda (Sphyraena genie) with shoal behind, these fish form large schools on the seaward side of the reef, Indo Pacific, Yap, Micronesia.

Oscar Dewhurst / Shelduck (Tadorna tadorna) landing on water. Gloucestershire, England, UK. March

Oscar Dewhurst / Shelduck (Tadorna tadorna) landing on water. Gloucestershire, England, UK. March

Oscar Dewhurst / Tufted duck (Aythya fuligula) male swimming. Gloucestershire, England, UK. March

Oscar Dewhurst / Northern pintail (Anas acuta) pair in flight. Gloucestershire, England, UK. March

Oscar Dewhurst / Eurasian teal (Anas crecca) male flapping its wings. Gloucestershire, England, UK. March

Oscar Dewhurst / Little egret (Egretta garzetta) wading in water at sunrise. Suffolk, England, UK. September

Oscar Dewhurst / Mute swan (Cygnus olor) swimming. Richmond Park, London, England, UK. December

Oscar Dewhurst / Mute swan (Cygnus olor) swimming. Richmond Park, London, England, UK. December

Oscar Dewhurst / Mute swan (Cygnus olor) swimming through ice. Richmond Park, London, England, UK. December

Oscar Dewhurst / Mute swan (Cygnus olor) adult swimming on a misty lake, backlit at sunrise. Richmond Park, London, England, UK. May

Oscar Dewhurst / Mute swan (Cygnus olor) cygnets swimming. London, England, UK. May

Oscar Dewhurst / Northern pintail (Anas acuta) male swimming. Gloucestershire, England, UK. March

Oscar Dewhurst / Northern pintail (Anas acuta) male displaying in water. Gloucestershire, England, UK. March

Oscar Dewhurst / Northern pintails (Anas acuta) in flight. Gloucestershire, England, UK. March

Doug Perrine / Moon shining through clouds, reflected on ocean, with Milky Way above. Anaeho'omalu Bay, South Kohala, Hawaii, October, 2020.

Doug Perrine / Sunset after-glow at Anaeho'omalu Bay with silhouetted palm trees, South Kohala, Hawaii. October, 2020.

Doug Perrine / Post-sunset glow at Anaeho'omalu Bay with silhouetted palm trees, South Kohala, Hawaii. October, 2020.

Doug Perrine / The Milky Way across night sky with palm trees in foreground, Ka'u District, Hawaii. May, 2021.

Doug Perrine / Wave surge drains from a lava rock shoreline at sunset, Keahole, North Kona, Hawaii. October, 2020.

Doug Perrine / Comet C/2020 F3 visible after sunset, with the peak of Maui's Haleakala volcano visible below, Maui, Hawaii. July, 2020.

Doug Perrine / The Milky Way in night sky above Coconut palms (Cocos nucifera) at Puako, South Kohala, Hawaii. October, 2020

Doug Perrine / The Milky Way in night sky above Anaeho'omalu Bay, South Kohala, Hawaii. October, 2020

Chris Mattison / Wall screw-moss (Tortula muralis) on concrete post. Droplets of water on fruiting bodies. Catbrook, Monmouthshire, Wales, UK.

Pascal Tordeux / Setting sun through trees reflected in pond, Vendeuil, Picardy, France, December 2020.

Pascal Tordeux / U-shaped valley formed by glacier, Vars, Hautes Alpes, France, August 2020.

Charlie Summers / Pied-billed grebe (Podilymbus podiceps) pair on pond, one with offering for mate, North Park, Colorado, USA.

Charlie Summers / Gabar goshawk (Micronisus gabar) bathing in rainwater puddle in sandy road, Nossob Road, Kgalagadi Transfrontier Park, South Africa.

Inaki Relanzon / Gentoo penguin (Pygoscelis papua) surfing the waves, Sea Lion Island, Falkland Islands.

Inaki Relanzon / Commerson's dolphins (Cephalorhynchus commersonii) group of three, 'surfing' in the waves, Falkland Islands.

Inaki Relanzon / Commerson's dolphin (Cephalorhynchus commersonii) surfing, Sea Lion Island, Falkland Islands.

Inaki Relanzon / Marine iguana (Amblyrhynchus cristatus) swimming, Puerto Ayora, Santa Cruz Island, Galapagos Islands.

Inaki Relanzon / Marine iguana (Amblyrhynchus cristatus) swimming, Galapagos Islands.

Inaki Relanzon / Montseny brook newt (Calotriton arnoldi) habitat, Montseny Natural Park, Barcelona, Spain, Europe.

Inaki Relanzon / Pied kingfisher (Ceryle rudis), Lake Bunyony, Uganda, Africa.

Inaki Relanzon / Bruarfoss waterfall, Iceland.

Inaki Relanzon / Escuain Canyon, autumn, Ordesa National Park, Pyrenees, Aragon, Spain.

Inaki Relanzon / Escuain Canyon, autumn, Ordesa National Park, Pyrenees, Aragon, Spain.

Joao Burini / A small stream with crossing in rainforest, Southeastern Atlantic Forest, Mantiqueira Mountain Range, Sao Francisco Xavier, Sao Paulo, Brazil.

David Noton / Trees reflected in lake at dawn, Croome Park, Worcestershire, England, UK. May, 2006.

David Noton / Trees reflected in lake at dawn, Croome Park, Worcestershire, England, UK. May, 2006.

Tony Wu / Red-spotted blenny (Blenniella chrysospilos) poking its head out of its home in coral, with two coral hermit crabs (Paguritta sp.) visible in the background. The blenny's home is the abandoned bur...

Tony Wu / Red-spotted blenny (Blenniella chrysospilos) looking out from its home in coral reef, the abandoned burrow of a vermetid gastropod (Dendropoma maximum) snail. Kumejima, Okinawa, Japan, Pacific Ocean

Tony Wu / Red-spotted blenny (Blenniella chrysospilos) male hatching a clutch of eggs that he has been watching over for about five days. Kumejima, Okinawa, Japan, Pacific Ocean.

Tony Wu / Red-spotted blenny (Blenniella chrysospilos) male watching over a clutch of eggs that are nearly ready to hatch. During spawning, males of this species select and prepare burrows like this, often aban...

Tony Wu / Male red-spotted blenny (Blenniella chrysospilos) watching over a clutch of eggs that are nearly ready to hatch. Kumejima, Okinawa, Japan, Pacific Ocean

Tony Wu / Red-spotted blenny (Blenniella chrysospilos) pair, just finished spawning. After attracting the female (foreground) to his burrow, the male moves to another hole while the female deposits eggs. He vis...

Tony Wu / Pair of red-spotted blennies (Blenniella chrysospilos). The male (dark) fertilizing eggs in the burrow beneath him. There was already a female in the burrow. While that female was depositing eggs, the...

Tony Wu / Male red-spotted blenny (Blenniella chrysospilos) fertilizing eggs. The female is in the burrow beneath him and has deposited eggs. Once the male finishes, he goes to another hole and waits for the fe...

Tony Wu / Pair of red-spotted blennies (Blenniella chrysospilos) spawning. The female (pale, foreground) has deposited eggs in the male's burrow. The male in the background was waiting in a nearby burrow an...

Richard Hopkins / Female European otter (Lutra lutra) surfacing mid stream in flowing river then diving, Dorset, UK, November.

Richard Hopkins / Pair of Red-throated divers (Gavia stellata) leaving the water to mate on the riverbank; the male dismounting before re-entering the water again, Shetland, UK, May.

Richard Hopkins / Female European otter (Lutra lutra) looking directly at camera as her male cub suckles before she turns away from him; he pesters her to feed him again. Shetland, UK, September.

Derek Galon / Aerial shot panning from view of freshwater lake to surrounding tropical forest canopy, Dominica, West Indies, 2019.

Derek Galon / Tilt up shot of Boiling Lake, the second largest of its kind in the world, Dominica, West Indies, 2020.

Derek Galon / Aerial tilt up shot moving from a view of Boiling Lake to surrounding tropical forest and areas of deforestation, Dominica, West Indies, 2020.

Derek Galon / Aerial shot ascending over the Boiling Lake the second largest boiling lake in the world, Dominica, 2020.

Derek Galon / Aerial shot ascending over Boiling Lake, the second largest in the world, Dominica, 2020.

Derek Galon / Drone shot revealing a view of Syndicate waterfall, Dominica, Eastern Caribbean, 2020.

Derek Galon / Drone shot tilting up Syndicate waterfall, Dominica, Eastern Caribbean, 2020.

Kim Taylor / Two Freshwater copepods (Cyclops sp) swimming through pond debris, Surrey, UK, May.

Kim Taylor / Slow motion clip of Song Thrush (Turdus philomelos) bathing in water in a bird bath, Surrey, UK, May.

Terry Whittaker / Sand martins (Riparia riparia) flying to and from their nests in old drainage pipes along River Mersey retaining walls. Greater Manchester, UK.