David Fleetham / Polka-Dot / Spotted batfish (Ogcocephalus radiatus) resting on seabed. Florida, USA.

David Fleetham / Polka-Dot Batfish (Ogcocephalus radiatus), Florida, USA.

Rod Williams / Straw dot (Rivula sericealis) Brockley Cemetery, Lewisham, London, England, UK, July.

Melvin Grey / Polka-dot tree frog (Hypsiboas punctatus) adult on leaf, Amazon, Ecuador. June.

Chris Mattison / Dot moth (Melanchra persicariae) Catbrook, Monmouthshire, June. Focus-stacked image.

Chris Mattison / Dot moth (Melanchra persicariae) Catbrook, Monmouthshire, June.

Paul Bertner / Polka-dot Treefrog (Hypsiboas punctatus), Manu National Park, Peru

Paul Bertner / Polka-dot Treefrog (Hypsiboas punctatus), Manu National Park, Peru

Constantinos Petrinos / Dash and dot goatfish (Parupeneus barberinus) stirring up the sand in search of food, followed by a Wrasse (Labridae) waiting to pick up easy meal, Lembeh Strait, North Sulawesi, Indonesia.

Charlie Summers / Transit of Mercury in front of the sun as seen from Denver, Colorado at 07:09 on 9 May 2016 Mercury is the dot in the lower portion of the sun, all other dots are sun spots.

Juergen Freund / Polka dots beetle weevil (Pachyrrhynchus congestus) Queensland, Australia.

Bernard Castelein / Ruby whiteface (Leucorrhinia rubicunda) resting, Klein Schietveld, Brasschaat, Belgium, April.

Andy Jackson / 2020VISION / Brown trout (Salmo trutta) resting on river bed breathing, River Lisa, Ennerdale, Lake District National Park, Cumbria, England, UK, October.

Pascal Kobeh / Dash-and-dot goatfish (Parupeneus barberinus / macronema) at night, Maldives. Indian ocean.

Sean Crane / Polka-dot Treefrog (Hypsiboas punctatus), Madidi National Park, Bolivia

Carol Walker / Appaloosa horse in ranch, Martinsdale, Montana, USA.

John Abbott / Eightspotted Flea Beetle (Omophoita cyanipennis) Stengl 'Lost Pines' Biological Station, Bastrop County, Texas, USA.

John Abbott / Hickory Borer (Megacyllene caryae) with mites, Anzalduas County Park, McAllen, Hidalgo County, Texas, USA.

Ashish & Shanthi Chandola / Spotted dove (Spilopelia chinensis), Sri Lanka.

Sean Crane / Polka-dot Treefrog (Hypsiboas punctatus), Madidi National Park, Bolivia

Martin Gabriel / Lily (Lilium leichtlinii) occurs in Japan, flowering in a private garden in Bavaria, Germany.

Alex Mustard / Harlequin shrimp (Hymenocera elegans) on blue sea star. This species of shrimps feeds on starfish, turning them upsidedown and keeping them as living larder. Bitung, North Sulawesi, Indonesia. Lembeh...

Alex Mustard / Portrait of Papuan toby (Canthigaster papua) Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Portrait of Nudibranch (Hypselodoris infucata) moving over the seabed. Seraya, Bali, Indonesia. Java Sea.

Alex Mustard / Large male Coral grouper (Cephalopholis miniata) in front of school of glassfish. Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Alex Mustard / Details of an old Bluespotted stingray (Taeniura lymma) lying on the seabed. Fury Shoal, Egypt. Red Sea

Bert Willaert / Polka dot treefrog (Hypsiboas punctatus) taken against white background, Bolivia.

RHONDA KLEVANSKY / Quiver tree (Aloe dichotoma) close up of knot and bark on trunk, Richtersveld National Park and World Heritage Center, Northern Cape, South Africa, August.

Rhonda Klevansky / Quiver tree (Aloe dichotoma) close up of bark, Richtersveld National Park and World Heritage Site, Northern Cape, South Africa, August.

Michael D. Kern / Great argus pheasant (Argusianus argus) wing feather against black background.

Michael D. Kern / Mountain peacock-pheasant (Polyplectron inopinatum) feather against black background.

Michael D. Kern / Mountain peacock-pheasant (Polyplectron inopinatum) feather against black background.

Michael D. Kern / Vulturine Guineafowl (Acryllium vulturinum) body feather against black background.

Michael D. Kern / Vulturine Guineafowl (Acryllium vulturinum) feather against black background.

Solvin Zankl / Leatherjacket (Parika / Meuschenia scaber) portrait, Poor Knights Islands, Marine Reserve, New Zealand, South Pacific Ocean, July.

Georgette Douwma / Checkerboard wrasse (Halichoeres hortulanus) with a Dash-and-dot goatfish (Parupeneus barbarinus) digging in the sand for food. Egypt, Red Sea.

Georgette Douwma / Bluespotted ribbontail ray (Taeniura lymna) digging in the sandy bottom for molluscs or worms, with a Red banded wrasse (Cheilinus fasciatus), a Dash-and-dot goatfish (Parupeneus barberinus), a Lyreta...

Georgette Douwma / Redbreasted wrasse (Cheilinus quinquecinctus) with a Dash-and-dot goatfish (Parapeneus barbarinus) digging in the sand for food. Egypt, Red Sea.

Georgette Douwma / Redbanded or Redbreasted wrasse (Cheilinus quinquecinctus) following a Dash-and-dot goatfish (Parapeneus barbarinus) digging in the sand for food. Egypt, Red Sea.

Rod Williams / Holly blue butterfly (Celastrina argiolus) feeding on ragwort, Lewisham, London, UK, August.

Rod Williams / Six-spot burnet moth (Zygaena filipendulae) feeding on thistle, Lewisham, London, UK, August.

Rod Williams / Two Six-Spot burnet moths (Zygaena filipendulae) feeding on thistle flower, Lewisham, London, UK, August.

Rod Williams / Two Six-spot burnet moths (Zygaena filipendulae) feeding on knapweed, Brockley Cemetery, Lewisham, July.

Ernie Janes / Fly agaric (Amanita muscaria) mushroom, Kelling Heath, Norfolk, UK, October

Ross Hoddinott / Common blue butterfly (Polyommatus icarus) on flower, Fontmell Down, Dorset, UK, June.

Robert Thompson / Large blue butterfly (Phengaris arion) on flower head, Viscos, Pyrenees National Park, Hautes Pyrenees, France, July

Robert Thompson / Red underwing skipper butterfly (Spialia sertorius) on flower, near Gavarnie, Pyrenees National Park, France, June.

Robert Thompson / Small blue butterfly (Cupido minimus) on leaf, near Gavarnie, Pyrenees National Park, France, June.

Robert Thompson / Alpine marsh orchid (Dactylorhiza alpestris) in flower, Pyrenees National Park, France, June.

Robert Thompson / Adonis blue butterfly (Polyommatus bellargus) on seed, Pyrenees National Park, France, June.

MYN / Andrew Snyder / Snail eating snake (Dipsas catesbyi) Chenapau, Guyana. Meetyourneighbours.net project.

Roland Seitre / Western quoll (Dasyurus geoffroii) Desert Park, Alice Springs, Northern Territory, Australia.

Georgette Douwma / Dash-and-dot goatfish (Parupeneus barberinus) Egypt, Red Sea.

Georgette Douwma / Yellow boxfish / Cube trunkfish (Ostracion cubicus) male. Egypt, Red Sea. Indo-Pacific. Found in reefs throughout the Pacific Ocean and Indian Ocean as well as the south eastern Atlantic Ocean.

Georgette Douwma / Yellow boxfish / Cube trunkfish (Ostracion cubicus) male. Egypt, Red Sea. Indo-Pacific. Found in reefs throughout the Pacific Ocean and Indian Ocean as well as the south eastern Atlantic Ocean.

Georgette Douwma / Yellow boxfish / Cube trunkfish (Ostracion cubicus) male. Egypt, Red Sea.

Edwin Giesbers / Close-up of the spot pattern on skin / fur on the back of a Jaguar (Panthera onca) head, captive, native to Southern and Central America.

Edwin Giesbers / Close-up of the spot pattern on skin / fur of a Jaguar (Panthera onca), captive, native to Southern and Central America.

Edwin Giesbers / Close-up of the spot pattern on skin / fur of a Jaguar (Panthera onca), captive, native to Southern and Central America.

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, San Cristobal, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, southern Isla Popa, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, Bastimentos, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, Bastimentos, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, Tranquilo Bay, Panama. Meetyourneighbours.net project

MYN / JP Lawrence / Strawberry Poison Frog (Oophaga pumilio) one of many colour morphs, Tranquilo Bay, Panama. Meetyourneighbours.net project

Jeff Rotman / Jewel grouper (Cephalopholis miniata) portrait, Red Sea, Egypt

Alex Mustard / Blue ringed octopus (Hapalochlaena lunulata) swims, jet propelled, across coral. Dampier Strait, Tropical West Pacific Ocean.

Claudio Contreras / Spotted boxfish (Ostracion meleagris), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Flag cabrilla (Epinephelus labriformis), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Franco Banfi / Eye detail of Tasselled wobbegong (Eucrossorhinus dasypogon) Cendana Jetty, Waigeo island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Headshield slugs (Micromelo undatus) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Franco Banfi / Marble shrimp (Saron sp.) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Georgette Douwma / Dash-and-dot goatfish (Parupeneus barberinus) feeding in sand, Andaman Sea, Thailand.

Georgette Douwma / Dash-and-dot goatfish (Parupeneus barberinus) feeding in sand, Andaman Sea, Thailand

Piotr Naskrecki / Dot-faced Katydid (Vestria punctata), Barbilla National Park, Costa Rica

Juergen Freund / Dashdot goatfish (Parupeneus barberinus) feeding on seabed, Bali, Indonesia.

Juergen Freund / Dashdot goatfish (Parupeneus barberinus) feeding on sandy seabed, Bali, Indonesia.

Stephen Dalton / Dot Moth (Melanchra persicariae) larva on twig. UK, September.

Pete Oxford / Polka-dot Treefrog (Hypsiboas punctatus), Napo River, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Polka Dot Moth (Pantherodes pardalaria), Mindo Cloud Forest, western slope of Andes, Ecuador

GEORGETTE DOUWMA / Dash-and-dot goatfish (Parupeneus barberinus) digging for food such as molluscs, crustaceans and urchins, in coral rubble, shadowed by a Yellowtail Coris (Coris gaimard). Misool, Raja Ampat, West Papu...

GEORGETTE DOUWMA / Dash-and-dot goatfish (Parupeneus barberinus) digging in coral rubble for prey, accompanied by a Yellowtail coris (Coris gaimard) hoping to catch any escaping prey. Misool, Raja Ampat, West Papua, Ind...

Guy Edwardes / Dot moth (Melanchra persicariae) on fern, Uplyme, Devon, England, July

GEORGETTE DOUWMA / Dash-and-dot goatfish (Parupeneus barberinus) digging for food such as molluscs, crustaceans and urchins, in coral rubble, shadowed by a Yellowtail coris (Coris gaimard) Misool, Raja Ampat, West Papua...

Robert Thompson / Polka dot wasp moth {Syntomeida epilais} Florida, USA, September

Stephen Dalton / Dot moth {Melanchra persicariae} on ivy leaf, UK

Fred Bavendam / Dot-and-dash Butterflyfish (Chaetodon pelewensis), Coral Sea, Australia

Fred Bavendam / Dot-and-dash Butterflyfish (Chaetodon pelewensis), Tonga

GEORGETTE DOUWMA / Dash-and-dot goatfish (Parupeneus barberinus) grubbing in sand, closely watched by a Spinecheek (Scolopsis sp., an undescribed species) hoping to catch escaping prey. Bali, Indonesia

GEORGETTE DOUWMA / Dash-and-dot goatfish (Parupeneus barberinus) grubbing in sand for prey, closely watched by Longbarbel goatfish (Parupeneus macronema) and a Twoline spinecheek (Scolopsis bilineatus) hoping to catch e...

Thomas Marent / Polka-dot Treefrog (Hypsiboas punctatus) on leaf, Manu National Park, Peru

Mark Moffett / Leafcutter Ant (Atta vollenveideri) nests dot the landscape, lines radiating from the nest are the ants' trunk trails, Paraguay

Nigel Cattlin / Glasshouse mealybug (Pseudococcus viburni) infesting the swollen stem of a Bunny-ears cactus, (Opuntia microdasys).

Norbert Wu / Polka-dot Batfish (Ogcocephalus radiatus), West Palm Beach, Florida

Onne van der Wal / Aerial view of boats moored off one of the many deserted islands that dot the coast of Puerto Rico, Caribbean. ^^^Rich aquatic life and coral reef make these areas popular with snorkellers and scuba d...

Onne van der Wal / Penguins dot the shores of Deception Island, Antarctic Peninsula.