Claudio Contreras,Claudio Contreras / Crocodile Flatheadfish (Cymbacephalus beauforti), Inanuran Island, Danajon Bank, Central Visayas, Philippines, April

Pascal Kobeh / Fringe-lip flathead (Thysanophrys otaitensis) camouflaged on sand, Sulu Sea, Philippines

David Fleetham / Longsnout flathead (Thysanophrys chiltonae) buried in seabed, Indonesia.

Bert Willaert / Crocodile Flathead (Cymbacephalus beauforti), Kimbe Bay, West New Britain, Papua New Guinea

Bert Willaert / Close-up of a flathead on sea floor, Bismarck Sea, Vitu Islands, West New Britain, Papua New Guinea

Constantinos Petrinos / Giant flathead (Cymbacephalus beauforti) close up of eyel. Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant flathead (Cymbacephalus beauforti) lying on a Finger Leather Coral (Sinularia polydactyla) Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant flathead (Cymbacephalus beauforti) lying on a Finger Leather Coral (Sinularia polydactyla) Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant flathead (Cymbacephalus beauforti) lying on a Finger Leather Coral (Sinularia polydactyla) Lembeh Strait, North Sulawesi, Indonesia.

Linda Pitkin / Crocodilefish (Cymbacephalus beauforti), resting on coral Dampier Strait, Raja Ampat, West Papua, Indonesia.

Linda Pitkin / Crocodilefish (Cymbacephalus beauforti), resting on coral Dampier Strait, Raja Ampat, West Papua, Indonesia.

Alex Mustard / Crocodilefish (Cymbacephalus beauforti) close up detail of the retractable eye-lashes, Mabul Island, Sabah, Borneo, Malaysia Celebes Sea

Alex Mustard / Crocodile fish (Cymbacephalus beauforti) sets an ambush by hiding in a leather coral (Sarcophyton sp) on a coral reef, Blue Magic, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Pascal Kobeh / Close-up of the head of a Common crocodilefish (Papilloculiceps longiceps) on the 'Carnatic' wreck. Egypt, Red Sea.

Georgette Douwma / Flatheads (Thysanophrys chiltonae) lying on sandy bottom in wreck. Egypt, Red Sea.

Pascal Kobeh / Close-up of a common crocodilefish / carpet flathead (Papilloculiceps longiceps), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Close-up of a Common crocodilefish / Carpet flathead (Papilloculiceps longiceps) camouflaged on sea bed, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Alex Mustard / Detail of retractable eye-lashes of Crocodilefish (Cymbacephalus beauforti) The crocodilefish is an ambush predator and this adaption helps it disguise itself while it lying in wait on the sea floor....

Alex Mustard / Two smaller male Crocodilefish (Papilloculiceps longiceps) nestle close to large female. Ras Mohammed Marine Park, Sinai, Egypt. Red Sea

Georgette Douwma / Beaufort crocodile fish (Cymbacephalus beauforti) under coral overhang on sandy bottom. Egytp, Red Sea.

Hiroya Minakuchi / Beaufort's Crocodilefish (Cymbacephalus beauforti) eyes, Borneo, Malaysia

Sue Daly / Close up of eye of Welander's flathead (Rogadius / Sorsogona welanderi) Lembeh Straits, Sulawesi, Indonesia

Ross and Diane Armstrong / Crocodile Flathead (Cociella crocodila) fish eyes, Russell Islands, Solomon Islands

Birgitte Wilms / Beaufort's Crocodilefish (Cymbacephalus beauforti) eye detail, 40 feet deep, Solomon Islands

Chris Newbert / Beaufort's Crocodilefish (Cymbacephalus beauforti) 40 feet deep, Solomon Islands

Chris Newbert / Beaufort's Crocodilefish (Cymbacephalus beauforti) detail of scales

Birgitte Wilms / Beaufort's Crocodilefish (Cymbacephalus beauforti) detail of scales, 50 feet deep, Solomon Islands

Chris Newbert / Flathead (Platycephalus sp) close-up of eyes, Red Sea, Egypt

Fred Bavendam / Beaufort's Crocodilefish (Cymbacephalus beauforti) camouflaged on ocean floor waiting for prey, Milne Bay, Papua New Guinea

Fred Bavendam / Beaufort's Crocodilefish (Cymbacephalus beauforti) camouflaged on coral, Lembeh Strait, Indonesia

Pete Oxford / Beaufort's Crocodilefish (Cymbacephalus beauforti), Banda Sea, Indonesia

Franco Banfi / Carpet flathead (Papilloculiceps longiceps) camouflaged on the seabed, Strait of Gubal, Red Sea, Egypt.

Magnus Lundgren / Camouflaged eye detail of a huge Crocodilefish (Cymbacephalus beauforti), Triton Bay, West Papua, Indonesia, Pacific Ocean.

Shane Gross / Crocodile fish (Cymbacephalus beauforti), ambush predator camouflaged and partially buried in sand on sea floor. Marsa Alam, Egypt.

Shane Gross / Red lionfish (Pterois volitans), two on sea floor beside Crocodile fish (Cymbacephalus beauforti), an ambush predator camouflaged and hidden. Marsa Alam, Egypt.

Georgette Douwma / Crocodile flathead (Cymbacephalus sp.) Lembeh Strait, North Sulawesi, Indonesia.

Linda Pitkin / Spiny, Midget / Devil flathead (Onigocia spinosa) Lembeh Strait, off Lembeh Island, 'Aer Prang', Lembeh Strait, North Sulawesi, Indonesia.

David Fleetham / Crocodile fish (Cymbacephalus beauforti) on a reef off the island of Yap, Micronesia.

Shane Gross / Crocodile fish (Cymbacephalus beauforti) juvenile, camouflaged. Palau.