Georgette Douwma / Painted Frogfish (Antennarius pictus), juvenile perched on bottle top. Rinca, Komodo National Park, Indonesia.

Juergen Freund / Baby orange Painted frogfish (Antennarius pictus) in a shell on the coral rubble. About 4mm in size. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Sargassum frogfish / anglerfish (Histrio histrio) in its floating Sargassum seaweed home, El Nido, Palawan, Philippines

Juergen Freund / Sargassum frogfish / anglerfish (Histrio histrio) in its floating Sargassum seaweed home, El Nido, Palawan, Philippines

Juergen Freund / Sargassum frogfish / anglerfish (Histrio histrio) in its floating Sargassum seaweed home, Miniloc island in the background, El Nido, Palawan, Philippines.

Constantinos Petrinos / Giant frogfish {Antennarius commerson} on Mushroom Leather coral, Sulawesi, Indonesia

Constantinos Petrinos / Giant frogfish {Antennarius commerson} Sulawesi, Indonesia

Solvin Zankl / Giant frogfish {Antennarius commerson} Lembeh, Sulawesi, Indonesia

Solvin Zankl / Striped / hairy frogfish {Antennarius striatus} Lembeh, Sulawesi

Chris Newbert / Painted Frogfish (Antennarius pictus) pair, Indonesia

Alex Mustard / Hairy / striated frogfish (Antennarius striatus) amongst algae (Caulerpa taxifolia) West Palm Beach, Gulf Stream, West Atlantic Ocean, Florida, USA.

Alex Mustard / Hairy / striated / striped frogfish (Antennarius striatus) Blue Heron Bridge, Riviera Beach, West Palm Beach, Florida, USA.

Alex Mustard / Hairy / striated / striped frogfish (Antennarius striatus) laying an ambush amongst weeds in shallow water, West Palm Beach, Gulf Stream, tropical West Atlantic Ocean, Florida, USA.

Alex Mustard / Hairy / striated / striped frogfish (Antennarius striatus) fishes with it's lure (illicium) while it remains camouflaged on the seabed, West Palm Beach, Gulf Stream, West Atlantic Ocean, Florida, USA.

Georgette Douwma / Painted Frogfish (Antennarius pictus) juvenile. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Painted Frogfish (Antennarius pictus) juvenile. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Painted Frogfish (Antennarius pictus) juvenile. Rinca, Komodo National Park, Indonesia.

Georgette Douwma / Painted Frogfish (Antennarius pictus) juvenile. Rinca, Komodo National Park, Indonesia.

Juergen Freund / Frogfish on seabed, Batangas, Philippines.

Juergen Freund / Striated / hairy frogfish (Antennarius striatus) camouflaged on seabed, Batangas, Philippines.

Juergen Freund / Striated / hairy frogfish (Antennarius striatus) camouflaged on seabed, Batangas, Philippines.

Juergen Freund / Striated frogfish (Antennarius striatus) with a worm in its mouth, Batangas, Philippines.

Juergen Freund / Frogfish (Antennarius sp) Moluccas Islands, Indonesia.

Juergen Freund / Striped frogfish (Antennarius striatus) hunting with lure extended, North Sulawesi, Indonesia.

Juergen Freund / Striped frogfish (Antennarius striatus) hunting with lure extended, North Sulawesi, Indonesia.

Juergen Freund / Warty / clown frogfish (Antennarius maculatus) with lure extended, Indo-pacific.

Birgitte Wilms / Warty Frogfish (Antennarius maculatus) with lure extended, Indonesia

Birgitte Wilms / Frogfish (Antennarius sp) with lure extended, Indonesia

Birgitte Wilms / Frogfish (Antennarius sp), Indonesia

Birgitte Wilms / Frogfish (Antennarius sp), Indonesia

Birgitte Wilms / Frogfish (Antennarius sp) camouflaged on hard coral, Papua New Guinea

Birgitte Wilms / Frogfish (Antennarius sp), Indonesia

Juergen Freund / Orange painted frogfish (Antennarius pictus) on a sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Baby orange Painted frogfish (Antennarius pictus) on the coral rubble. About 4mm in size. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Giant frogfish (Antennarius commerson) on pieces of coral. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Cream coloured Painted frogfish (Antennarius pictus) on a sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Grey Painted frogfish (Antennarius pictus) on a sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Yellow Painted frogfish (Antennarius pictus) on the sand. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Yellow Giant / Commerson's frogfish (Antennarius commerson). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Juvenile Warty / Clown frogfish (Antennarius maculatus) on a sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Sargassum frogfish / anglerfish (Histrio histrio) camouflaged amongst floating Sargassum seaweed, Palawan, Philippines.

Hiroya Minakuchi / Frogfish (Antennariidae) face, Borneo, Malaysia

Hiroya Minakuchi / Frogfish (Antennariidae) camouflaged in coral, Borneo, Malaysia

Hiroya Minakuchi / Frogfish (Antennariidae) camouflaged on reef, Borneo, Malaysia

Juergen Freund / Pink Painted frogfish (Antennarius pictus) on a pink sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Juvenile Warty / Clown frogfish (Antennarius maculatus) on a sponge. Lembeh Strait, Sulawesi, Indonesia

Juergen Freund / Pink Painted frogfish (Antennarius pictus) well-camouflaged on a pink sponge. Lembeh Strait, Sulawesi, Indonesia

Georgette Douwma / Giant frogfish (Antennarius commerson) camouflaged against coral reef, able to change colour and shape, Rinca, Komodo National Park, Indonesia

Tim Laman / Frogfish ( Antennarius) camouflaged to represent a sponge, Malapascua Island, Visayan Sea, Philippines

Tim Laman / Frogfish (Antennarius) camouflaged to resemble a sponge, Malapascua Island, Visayan Sea, Philippines

Jeff Rotman / Camouflaged Juvenile frogfish (Antennarius Coccineus) Red Sea, Eilat, Israel

Sue Daly / Painted frogfish (Antennarius pictus) close up of face, Cebu, Philippines, March

Sue Daly / Painted Frogfish (Antennarius pictus) camouflaged amongst tube sponge on coral reef, Cebu, Philippines, March

Sue Daly / Painted Frogfish (Antennarius pictus) camouflaged amongst tube sponge on coral reef, Cebu, Philippines, March

Jeff Rotman / Hairy Frogfish (Antennarius striatus) trying to eat a Flounder that is too big. Lembeh Strait, Celebes Sea, Sulawesi, Indonesia.

Jeff Rotman / Hairy frogfish / Anglerfish (Antennarius striatus) Lembeh Strait, Celebes Sea, Sulawesi, Indonesia.

Hiroya Minakuchi / Frogfish (Antennarius sp) on ocean floor, Celebes Sea

Hiroya Minakuchi / Frogfish (Antennarius sp) showing lure used to attract prey, Celebes Sea

Doug Perrine / Longlure frogfish {Antennarius multiocellatus} resting amongst Azure vase sponges, Dominica, Caribbean

Doug Perrine / Longlure frogfish {Antennarius multiocellatus} Dominica, Caribbean

Juergen Freund / Yellow Frogfish {Antennarius sp} camouflaged on sponge, Maluccas, Indonesia

Juergen Freund / Yellow Frogfish {Antennarius sp} Indo-Pacific

Constantinos Petrinos / Painted frogfish {Antennarius pictus} Sulawesi, Indonesia

Constantinos Petrinos / Anglerfish / Giant Frogfish {Antennarius commerson} head profile, Sulawesi, Indonesia

Constantinos Petrinos / Giant frogfish {Antennarius commerson} Sulawesi Note - Pectoral fin adapted for 'walking'.

Florian Graner / Bloody frogfish {Antennarius sanguinaeus} Cocos Island, Costa Rica

Constantinos Petrinos / Painted frogfish {Antennarius pictus} Male (small) and female (large) Sulawesi, Indonesia

Constantinos Petrinos / Painted frogfish {Antennarius pictus} Sulawesi, Indonesia

Constantinos Petrinos / Striped frogfish {Antennarius striatus} with lure, Sulawesi, Indonesia

Georgette Douwma / Hairy frogfish (Antennarius striatus) with lure extended, Kungkungan Bay, Sulawesi, Indo-Pacific Ocean.

Nature Production / Giant frogfish {Antennarius commerson} camouflaged amongst coral, Malaysia

Nature Production / Striped / Striated Frogfish {Antennarius striatus} attracting juvenile Green Fish {Girella punctata} by wagging its lure, captive, Japan

Nature Production / Striped / Striated Frogfish {Antennarius striatus} attracting juvenile Green Fish {Girella punctata} by wagging its lure, captive, Japan

Nature Production / Striped / Striated Frogfish {Antennarius striatus} swallowing juvenile Green Fish {Girella punctata} that has been attracted to its lure, captive, Japan

Constantinos Petrinos / Giant Frogfish pectoral fin and gill opening (Antennarius commerson) Sulawesi, Indonesia

Constantinos Petrinos / Yellow frogfish and Black frogfish with lure (Antennarius sp) Sulawesi, Indonesia

Constantinos Petrinos / Yellow frogfish (Anglerfish) (Antennarius) with extended lure, North Sulawesi, Indonesia

Chris Newbert / Frogfish (Antennarius sp) using lure to attract prey, 30 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) 30 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) 30 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) 30 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) using lure to attract prey, 30 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) 80 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) 80 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) male 70 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) male 70 feet deep, Papua New Guinea

Chris Newbert / Frogfish (Antennarius sp) female 70 feet deep, Papua New Guinea

Willem Kolvoort / Common frog (Rana temporaria) male frog attempts to mate with every object that looks like a female and here he has caught a Barbel (Barbus barbus) and is attempting to mate with it, Holland

David Hall / Giant frogfish (Antennarius commerson) perfectly camouflaged against reef, Indonesia

Doug Perrine / Giant frogfish {Antennarius commerson} camouflaged on yellow sponge, Mabul Island, Sabah, Celebes Sea, Borneo, Malaysia

Nigel Bean / Striped frogfish {Antennarius striatus} with lure extended, captive

David Hall / Longlure frogfish {Antennarius multiocellatus} camouflaged in sponge. Dominica, West-Indies.

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with white skin colour, Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Painted frogfish (Antennarius pictus) juvenile with white skin colour, Lembeh Strait, North Sulawesi, Indonesia

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with yellow skin colour, Lembeh Strait, North Sulawesi, Indonesia.

GEORGETTE DOUWMA / Painted anglerfish (Antennarius pictus) with pink skin colour, Lembeh Strait, North Sulawesi, Indonesia.