Alex Mustard / Leafy seadragon (Phycodurus eques). Wool Bay Jetty, Edithburgh, Yorke Peninsula, South Australia.

David Fleetham / Leafy sea dragon (Phycodurus eques) portrait, Spencer Gulf, South Australia, Great Australian Bight.

David Fleetham / Leafy sea dragon (Phycodurus eques) camouflaged against the plant life under a wharf, Spencer Gulf, South Australia, Indian Ocean.

David Fleetham / Leafy sea dragon (Phycodurus eques) among seaweed, Spencer Gulf, South Australia. January.

Alex Mustard / Ornate cowfish (Aracana ornata) and Leafy sea dragon (Phycodurus eques) St Vincent Gulf, South Australia.

Alex Mustard / Leafy seadragon (Phycodurus eques) male carrying eggs, swims over seagrass meadow. Wool Bay, Edithburgh, South Australia. Gulf of St Vincent.

Alex Mustard / Leafy seadragon (Phycodurus eques) demonstrates the effectiveness of its camouflage as it shelters amongst seaweeds. This individual is a male carrying eggs. Wool Bay Jetty, Edithburgh, Yorke Peninsul...

Gary Bell/ Oceanwide / Leopard Flounder (Bothus pantherinus) camouflaged on ocean floor, Anilao, Philippines

Gary Bell/ Oceanwide / Sole (Zebrias sp) juvenile, Anilao, Philippines

Shane Gross / Larval flounder (possibly Laeops Kitahara) in the open ocean at night off Anilao, Philippines.

Sue Daly / Close up of a Plaice (Pleuronectes platessa), swims away, Sark, British Channel Islands, UK, June.

Solvin Zankl / Flatfish (Bothidae sp) larva, Atlantic Ocean off Cape Verde. Captive.

Alex Mustard / Lemon sole (Microstomus kitt) portrait. Gardur, south west Iceland. North Atlantic Ocean

Alex Mustard / Peacock flounder (Bothus lunatus) resting on the seabed, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Jeff Rotman / Windowpane flounder (Scophthalmus aquosus) camouflaged on sandy seabed, Hodgekin's Cove, Massachusetts, USA, Atlantic Ocean.

Jeff Rotman / Yellowtail flounder (Limanda ferruginea) caught in an overflowing dragger fishing net. Stellwagon Bank, New England, USA, Atlantic Ocean, October

Wild Wonders of Europe / Banfi / Wide-eyed flounder (Bothus podas) on seabed, Marine Reserve, Monaco, Mediterranean Sea, July 2009

Flip Nicklin / Flatfish (Pleuronectiformes) camouflaged on ocean floor, California

Fred Bavendam / Flowery Flounder (Bothus mancus) camouflaged against Coral, Lembeh Strait, Indonesia

John Downer Productions / Peacock flounder attempts to simulate the squares of chessboard (Bothus lunatus) - Resolution restriction due to image digitised from film - 'Weird Nature' BBC tv series.

Gary Bell/ Oceanwide / Sole (Soleidae) juvenile, Anilao, Philippines

Gary Bell/ Oceanwide / Sole (Zebrias sp) juvenile, Anilao, Philippines

Pascal Kobeh / Wide-eyed flounder (Bothus podas) on the sandy bottom, Canary Islands

Pascal Kobeh / Wide-eyed flounder (Bothus podas) on the sandy bottom, Canary Islands

Pascal Kobeh / Common eagle ray (Myliobatis aquila) searching in the sand for a prey with a pearly razorfish / cleaver wrasse (Xyrichtys novacula). On the right, we can make out a flounder laying on the sand and bro...

Pascal Kobeh / Close-up of Peacock flounder (Bothus mancus), Sulu sea, Philippines

Alex Mustard / Mimic octopus (Thaumoctopus mimicus) swims over a sandy seabed in a shape considered by some to be a flounder impersonation. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Shane Gross / Larval flounder (possibly Laeops Kitahara) in the open ocean at night off Anilao, Philippines.

Nick Hawkins / A winter flounder (Pseudopleuronectes americanus) camouflaged against the seabed off Nova Scotia, Canada. July.

Nick Hawkins / A winter flounder (Pseudopleuronectes americanus) camoflages against the seafloor off Nova Scotia, Canada. July.

Pascal Kobeh / Wide-eyed flounder (Bothus podas) on a sandy bottom, Azores, Atlantic ocean.

Georgette Douwma / Leopard flounder fish (Bothus pantherinus) camouflaged on sand. North Sulawesi, Indonesia.

Alex Mustard / Mimic octopus (Thaumoctopus mimicus) swimming over a sandy seabed in a shape considered by some to be a flounder impersonation. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Ashley Cooper / Man with a Pacific halibut (Hippoglossus stenolepis) caught during sport fishing, Seward, Alaska, USA, September 2004.

David Fleetham / Divers and Peacock flounder (Bothus mancus) off the Island of Lanai, Hawaii. December 2013.

David Fleetham / Flatfish in larval stage, probably a peacock flounder (Bothus mancus),at night, several miles off the Kona Coast of the Big Island, Hawaii.

Linda Pitkin / Peacock flounder (Bothus lunatus), camouflaged on sandy sea bed Bonaire, Leeward Antilles, Caribbean.

Doug Perrine / Left-eyed flounder (Engyprosopon xenandrus) larva, photographed at night in surface waters of deep ocean off Kailua Kona, Hawaii, USA.

Doug Perrine / Planktonic larval left-eyed flounder or flatfish, possibly Engyprosopon xenandrus. Photographed at night in surface waters of deep ocean off Kailua Kona, Hawaii, Central Pacific Ocean.

Jean E. Roche / Juvenile Sole (Solea vulgaris) fish fry, caught for scientific research by Tour du Valat. La Gacholle, Camargue, France.

Sue Daly / Flounder (Platichthys flesus), Trondheimsfjord, Norway, July.

Sue Daly / Flounder (Platichthys flesus), Trondheimsfjord, Norway, July.

Sue Daly / European plaice (Pleuronectes platessa) close up, Jersey, British Channel Islands, June.

Sue Daly / Portrait of a Sole (Solea solea) swimming over the seabed, filmed at night, Sark, British Channel Islands, UK, October

Sue Daly / Portrait of a Sole (Solea solea) swimming over the seabed, filmed at night, Sark, British Channel Islands, UK, October.

Sue Daly / Portrait of a Sole (Solea solea) camouflaged against the seabed, filmed at night, Sark, British Channel Islands, UK, October.

Sue Daly / Plaice (Pleuronectes platessa) swimming over the seabed, Sark, British Channel Islands, UK, June.

Sue Daly / Close-up of a Plaice (Pleuronectes platessa) swimming over the seabed, Sark, British Channel Islands, UK, June.

Sue Daly / Plaice (Pleuronectes platessa) swimming over the seabed, Sark, British Channel Islands, UK, June.

Claudio Contreras / Tropical flounder (Bothus mancus) and Chinese trumpetfish (Aulostomus chinensis), Socorro Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Tropical Flounder (Bothus mancus), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, West...

Claudio Contreras / Tropical Flounder (Bothus mancus), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, West...

Claudio Contreras / Tropical Flounder (Bothus mancus), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific Ocean, West...

Claudio Contreras / Tropical Flounder (Bothus mancus) swimming, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Paci...

Linda Pitkin / Ocellated flounder / Twin-spot flounder (Pseudorhombus dupliciocellatus), camouflaged on sea bed Lembeh Strait, North Sulawesi, Indonesia, February 2016

Georgette Douwma / Leopard flounder fish (Bothus pantherinus). Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Indian halibut (Psettodes erumei) juvenile on sea bed, Lembeh Strait, North Sulawesi, Indonesia.

Solvin Zankl / Deep sea hatchetfish (Sternoptyx diaphana) profile. Deep sea species from Atlantic Ocean close to Cape Verde. Captive.

Solvin Zankl / Flatfish (Bothidae sp) larva with upright swimming and bilaterally symmetric bodies. When the larva develops to an adult asymmetric vertebrat, the right eye migrates from the right side of the body to...

Solvin Zankl / Flatfish (Bothidae sp) larva with upright swimming and bilaterally symmetric bodies. When the larva develops the right eye migrates from the right side of the body to the left where it 'joins' the lef...

Georgette Douwma / Peacock flounder (Bothus lunatus) just visible on seabed. Lembeh, Sulawesi, Indonesia.

Scott Leslie / Winter Flounder (Pleuronectes americanus) camouflaged among Green Sea Urchins (Strongylocentrotus droebachiensis) barren, Passamaquoddy Bay, Maine

Scott Leslie / Atlantic Halibut (Hippoglossus hippoglossus), Bonne Bay, Newfoundland, Canada

MYN / Paul van Hoof / European plaice (Pleuronectes platessa) adult, The Netherlands, March, Meetyourneighbours.net project

Constantinos Petrinos / Wide-eyed flounder (Bothus podas) perfectly camouflaged against the sandy substrate. Athens, Attica Region, Greece. Saronic Gulf, Aegean Sea. August.

Thomas Marent / Gelada Baboon (Theropithecus gelada) pair grooming, Simien Mountains National Park, Ethiopia

Jeff Rotman / Catch of Yellowtail flounder (Limanda ferruginea) sorted on deck of fishing dragger. Stellwagen Bank National Marine Sanctuary, Massachusetts, USA. June 2013.

Jeff Rotman / Fishermen sorting catch of Yellowtail Flounder (Limanda ferruginea) on deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean Model released.

Jeff Rotman / Fishermen sorting catch of Yellowtail flounders (Limanda Ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean,...

Jeff Rotman / Atlantic cod (Gadus morhua) and Yellowtail flounders (Limanda ferruginea) on deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean, March 2009.

Jeff Rotman / Bycatch of Yellowtail flounders (Limanda ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean, March 2009.

Jeff Rotman / Bycatch of Yellowtail flounders (Limanda ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean, March 2009.

Jeff Rotman / Fishermen sorting catch of Yellowtail flounders (Limanda Ferruginea) and Atlantic cod (Gadus morhua) on the deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean,...

Jeff Rotman / Bycatch of Yellowtail flounders (Limanda Ferruginea) and Little skate (Leucoraja erinacea) on deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean, March 2009.

Jeff Rotman / Fisherman cleaning Yellowtail flounder (Limanda ferruginea) on the deck of fishing dragger. Stellwagen Bank, New England, United States, North Atlantic Ocean, March 2009. Model released.

Jeff Rotman / Bycatch of Yellowtail flounders (Limanda ferruginea) on deck of fishing dragger. Stellwagen Banks, New England, United States, North Atlantic Ocean, March 2009.

Jeff Rotman / Fishing dragger emptying net full of Yellowtail flounders (Limanda ferruginea) and Atlantic Cod (Gadus morhua). Stellwagen Bank, New England, United States; North Atlantic Ocean, March 2009.

Jeff Rotman / Fisheries observer measuring Yellowtail flounder (Limanda ferruginea) to ensure that it conforms with legal standards. Stellwagen Bank, New England, United States, North Atlantic Ocean, December 2011.

MYN / Paul van Hoof / European Flounder (Platichthys flesus) The Netherlands, March, Meetyourneighbours.net project

Alex Hyde / European Plaice juvenile (Pleuronectes platessa) on black background. Isle of Mull, Scotland, UK. June.

Alex Hyde / European Plaice juvenile (Pleuronectes platessa) on a white background. Isle of Mull, Scotland, UK. June.

Alex Hyde / European Plaice juvenile (Pleuronectes platessa) camouflaged against sand. Isle of Mull, Scotland, UK. June.

Alex Hyde / Close up of head of European Plaice (Pleuronectes platessa) camouflaged in sand.Taken in mobile field studio. Isle of Mull, Scotland, UK. June.

Pascal Kobeh / Rock sole (Lepidopsetta bilineata), Alaska, USA, Gulf of Alaska. Pacific ocean.

Pascal Kobeh / Rock sole (Lepidopsetta bilineata), Alaska, USA, Gulf of Alaska. Pacific ocean.

Pascal Kobeh / Close up of head of Rock sole (Lepidopsetta bilineata) from above, Alaska, USA, Gulf of Alaska. Pacific ocean.

Pascal Kobeh / Alaska turbot (Pleuronichthys coenosus) camouflaged on sea floor, USA, Gulf of Alaska. Pacific ocean.

Pascal Kobeh / Peacock flounder (Bothus mancus) resting on coral reef, Maldives. Indian Ocean.

Pascal Kobeh / Wide-eyed flounder (Bothus podas) male on sandy sea floor, Gozo Island, Malta. Mediterranean Sea.

Pascal Kobeh / Wide-eyed flounder (Bothus podas) male on sandy sea floor, Gozo Island, Malta. Mediterranean Sea.

Pascal Kobeh / Wide-eyed flounder (Bothus podas) female on sandy sea floor, Gozo Island, Malta. Mediterranean Sea.

Jeff Rotman / Bycatch of Little skates (Leucoraja erinacea) and Yellowtail flounder (Limanda ferrunginea) being returned to ocean from trawler. Stellwagen Banks, New England, United States, North Atlantic Ocean

Sue Daly / Flounder (Platichthys flesus) St Abbs Voluntary Marine Reserve, Scotland (North Sea).

Sue Daly / Plaice (Pleuronectes platessa) Bouley Bay, Jersey, British Channel Islands.

Sue Daly / Plaice (Pleuronectes platessa) Bouley Bay, Jersey, British Channel Islands.

Alex Hyde / Juvenile European Flounder (Platichthys flesus) camouflaged against silty estuarine sediment. The River Tweed, Berwick-upon-Tweed, Northumberland, UK. May. Photographed in mobile field studio.

Alex Hyde / Three juvenile European Flounders (Platichthys flesus) camouflaged against silty estuarine sediment. The River Tweed, Berwick-upon-Tweed, Northumberland, UK. May. Photographed in mobile field studio.

Alex Hyde / Juvenile European Flounder (Platichthys flesus) photographed in mobile field studio. The River Tweed, Berwick-upon-Tweed, Northumberland, UK. May.

Alex Hyde / Juvenile European Flounder (Platichthys flesus) photographed in mobile field studio. The River Tweed, Berwick-upon-Tweed, Northumberland, UK. May.

Kevin Schafer / Gentoo Penguin (Pygoscelis papua) on ice floe, Neko Harbor, Antarctic Peninsula, Antarctica

Jussi Murtosaari / European flounder (Platichthys flesus) young fish hidden to sand, in aquarium, Aland Islands, Finland, August.

Jeff Rotman / Fisherman measures undersized Yellowtail Flounder (Limanda ferruginea) on deck of fishing trawler. Stellwagen Banks, New England, United States, North Atlantic Ocean

Jeff Rotman / Fisherman shoveling bycatch of Little Skate (Leucoraja erinacea), American lobster (Homarus americanus) and Yellowtail Flounder (Limanda ferruginea) overboard. Stellwagen Banks, New England, United St...