Georgette Douwma / Giant Frogfish (Antennarius commerson) on coral reef. The animal can vary greatly in colour and pattern. Bali, Indonesia, December.

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

Pascal Kobeh / Head of a Giant anglerfish / frogfish (Antennarius commersoni / commerson), Sulu sea, Philippines

Alex Mustard / Giant frogfish (Antennarius commersoni). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Shane Gross / Giant frogfish / Commerson's frogfish (Antennarius commerson) Sombrero Island, Anilao, Philippines.

David Fleetham / Commerson's frogfish (Antennarius commerson) camouflaged against surroundings. Hawaii.

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Alex Mustard / Diver with Yellow giant frogfish (Antennarius commersoni) on a coral reef. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea. Model released.

David Fleetham / Commerson's frogfish (Antennarius commerson) camouflaged against coral on bow of Alma Jane wreck, diver in background. Off Sabang Beach, Puerto Galera, Mindoro, Philippines. April 2017. Model rele...

David Fleetham / Commerson's frogfish (Antennarius commersoni) pair, Maui, Hawaii.

David Fleetham / Parasitic isopod (Creniola breviceps) attached to Commerson's / Giant frogfish (Antennarius commerson), Hawaii.

David Fleetham / Giant / Commerson's Frogfish (Antennarius commerson) pair on coral reef, Hawaii.

Alex Mustard / Giant / Commerson's frogfish (Antennarius commersoni) waiting to ambush prey. Amongst Crinoids and Sponges on coral reef. Nusa Kode, Rinca Island, Komodo National Park, Indonesia. South East Asia. Hor...

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) swimming awkwardly to its new ambush location, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) swimming awkwardly to its new ambush location, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) swimming awkwardly to its new ambush location, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) swimming awkwardly to its new ambush location, Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Commerson's frogfish (Antennarius commerson) sitting on a sponge concealed by sea fans, Shaw Thing, Eastern Fields of Papua New Guinea.

Tony Wu / Giant frogfish (Antennarius commersoni) silhouetted against sea surface from below, Ambon, Indonesia.

Georgette Douwma / Giant frogfish (Antennarius commerson) perched on sponge. Mabul, Malaysia.

Georgette Douwma / Giant frogfish (Antennarius commerson) perched on sponge. Mabul, Malaysia.

Pascal Kobeh / Giant anglerfish (Antennarius commerson) camouflaged on hard coral (Porites sp.) Mauritius, Indian Ocean.

Franco Banfi / Giant frogfish (Antennarius commerson) Cocos Island National Park, Costa Rica, East Pacific Ocean

Pascal Kobeh / Giant anglerfish or frogfish (Antennarius commerson) hiding behind sponge, Maldives, Indian Ocean.

Constantinos Petrinos / Giant anglerfish (Antennarius commerson) swimming awkwardly to its new ambush location, Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / Portrait of giant frogfish (Antennarius commerson) Mabul Island, Sabah, Malaysia. Borneo. Celebes Sea.

Alex Mustard / Trio Giant frogfish (Antennarius commerson) female and two males. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Pair of Giant frogfish (Antennarius commersoni), male on the left, female above on right on sponges. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Giant frogfish (Antennarius commerson) lays an ambush amongst soft corals. The Alternatives, Sha'ab Mahmood, Sinai, Egypt. Red Sea.

Norbert Wu / Commerson's Frogfish (Antennarius commersonii) pair, Ambon, Indonesia

Jeff Rotman / Giant frogfish (Antennarius commerson) close up face portrait, Eilat, Israel, Red Sea

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

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

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

Fred Bavendam / Commerson's Frogfish (Antennarius commersonii) camouflaged, Andaman Sea, Thailand

Fred Bavendam / Commerson's Frogfish (Antennarius commersonii) pair, Lembeh Strait, 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'.

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

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

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

Solvin Zankl / Giant frogfish with mouth open {Antennarius commerson} Lembeh, Sulawesi

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

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

Constantinos Petrinos / Giant frogfish {Antennarius commerson} on coral reef, Lembeh Strait, Sulawesi Indonesia

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii) in reef, Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

Gary Bell/ Oceanwide / Commerson's Frogfish (Antennarius commersonii), Anilao, Philippines

David Fleetham / Giant / Commerson's frogfish (Antennarius commerson) on green sea turtle (Chelonia mydas) on shipwreck, Hawaii.

David Fleetham / Giant / Commerson's frogfish (Antennarius commerson), juvenile, on Red slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii.

David Fleetham / Commerson's / Giant frogfish (Antennarius commerson), imitating a sponge covered stand of black coral, Hawaii.

David Fleetham / Commerson's / Giant frogfish (Antennarius commerson), juvenile, Hawaii.

David Fleetham / Commerson's / Giant frogfish (Antennarius commerson), on Red slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii.

David Fleetham / Commerson's / Giant frogfish (Antennarius commerson), juvenile, perched on a Red slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii.

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

Constantinos Petrinos / Giant frogfish {Antennarius commerson} on mushroom leather coral {Sarcophyton sp} Sulawesi, Indonesia

David Fleetham / Commerson's frogfish (Antennarius commersoni) juvenile sheltering among spines of Slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii, Pacific Ocean.

David Fleetham / Commerson's frogfish (Antennarius commerson) swimming over reef, Hawaii, Pacific Ocean..

David Fleetham / Commerson's frogfish (Antennarius commerson), well camouflaged, perched at bow of shipwreck of Alma Jane off Puerto Galera, Mindoro, Philippines, South China Sea, Pacific Ocean.

David Fleetham / Commerson's frogfish (Antennarius commerson) perched on tube sponge, Philippines, Pacific Ocean.

David Fleetham / Commerson's frogfish (Antennarius commersonii) portrait, Hawaii, Pacific Ocean.

Pascal Kobeh / Commerson's frogfish (Antennarius commerson) hiding amongst Sponge and Coral. Flores Sea, Indonesia.

David Fleetham / Commerson's frogfish (Antennarius commersoni) camouflaged in reef, Hawaii.

Alex Mustard / Portrait of a Giant frogfish (Antennarius commersoni) waiting in ambush hidden amongst sponges growing on a coral reef. Dauin Marine Protected Area, Dumaguete, Negros, Philippines. Bohol Sea, tropical...