Alex Mustard / Orange painted frogfish (Antennarius pictus) fishing. Here the frogfish is illuminated by a snooted strobe and the background sand lit with a red LED torch. Bitung, North Sulawesi, Indonesia. Lembeh S...

Gary Bell/ Oceanwide / Tasselled Frogfish (Rhycherus filamentosus) showing lure, Port Phillip Bay, Mornington Peninsula, Victoria, Australia

Gary Bell/ Oceanwide / Tasselled Frogfish (Rhycherus filamentosus) showing lure, Port Phillip Bay, Mornington Peninsula, Victoria, Australia

Alex Mustard / Warty / Clown frogfish (Antennarius maculatus) male portrait, Anilao, Batangas, Luzon, Philippines, March

Andy Trowbridge / Split level shot of a fly fisherman (Murray Trowbridge) releasing a large brown trout (Salmo trutta) in a gin clear 'backcountry' river, North Canterbury South Island, New Zealand. January, 2012. Mode...

David Shale / Angler fish Melanocetus murrayi, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish (Melanocetus murrayi) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish {Linophryne sp} from the Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish (Melanocetus murrayi) Mid-Atlantic Ridge, North Atlantic Ocean

Birgitte Wilms / Psychedelic Frogfish (Histiophryne psychedelica) discovered in 2008, lacks the typical lure and striped pattern mimicks hard corals, Indonesia

Norbert Wu / Humpback Anglerfish (Melanocetus johnsoni) deep sea species showing bioluminescent fishing pole attracts deep sea prey, California

Norbert Wu / Devil Angler (Linophryne indica) fish, deep sea species showing large female with dwarf male attached

Norbert Wu / Humpback Anglerfish (Melanocetus johnsoni) deep sea species showing fishing pole with bioluminescent lure used to attract prey

Chris Newbert / Rosy-lipped Batfish (Ogcocephalus sp) portrait, 100 feet deep, Cocos Island, Costa Rica

Birgitte Wilms / Rosy-lipped Batfish (Ogcocephalus porrectus), Cocos Island, Costa Rica

Norbert Wu / Humpback Anglerfish (Melanocetus johnsoni) deep sea species cleared and stained for show, bone (Red) and cartilage (Blue)

Norbert Wu / Humpback Anglerfish (Melanocetus johnsoni) deep sea species cleared and stained for show, bone (Red) and cartilage (Blue)

Norbert Wu / Devil Angler (Linophryne sp) deep sea species larvae with large yolky egg which is a deep sea reproductive strategy, Celebes Sea

Norbert Wu / Cosmopolitan Whipnose (Gigantactis vanhoeffeni) a deep sea anglerfish with long fishing pole using bioluminescent lure attracts prey

David Shale / Female Angler fish {Himantolophus sp} deep sea species

Alex Mustard / Long exposure portait of an Orange painted frogfish (Antennarius pictus). Anilao, Batangas marine protected area, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Alex Mustard / Painted frogfish (Antennarius pictus) hides amongst rope sponges on a coral reef. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

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.

Pascal Kobeh / Painted frogfish / anglerfish (Antennarius pictus) Sulu Sea, Philippines.Small repro only

David Fleetham / Painted frogfish (Antennarius pictus) with first dorsal spine and lure extended to attract prey. Dumaguete, Philippines.

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

Gary Bell/ Oceanwide / Red Handfish (Brachionichthys politus), Tasmania, Australia

Gary Bell/ Oceanwide / Red Handfish (Brachionichthys politus), Tasmania, Australia

Gary Bell/ Oceanwide / Warty Frogfish (Antennarius maculatus), Anilao, Philippines

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

Gary Bell/ Oceanwide / Striated Frogfish (Antennarius striatus), 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...

Magnus Lundgren / Wild Wonders of China / Painted frogfish (Antennarius pictus) Basalt Island, Sai Kung District, Hong Kong, CHina.

Magnus Lundgren / Wild Wonders of China / Painted frogfish (Antennarius pictus) Basalt Island, Sai Kung District, Hong Kong, China.

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

Richard Herrmann / Goosefish (Lophius sp), Hake (Merluccius sp), and squid catch, Guilvinec, Brittany, France

Franco Banfi / Painted anglerfish / frogfish (Antennarius pictus) next to coral, Pura Vida House Reef, Dumaguete, East Negros Island, Central Visayas, Philippines, Pacific Ocean.

Sue Daly / Anglerfish (Lophius piscatorius), Trondheimsfjord, Norway, July.

Sue Daly / Anglerfish (Lophius piscatorius), Trondheimsfjord, Norway, July.

Sue Daly / Angler fish (Lophius piscatorius) Isle of Man, July.

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.

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Linda Pitkin / Painted frogfish (Antennarius pictus) Lembeh Strait, North Sulawesi, Indonesia

Alex Mustard / Yellow warty frogfish (Antennarius maculatus) Seraya, Tulamben area, Bali, Indonesia. Java Sea.

Alex Mustard / Orange painted frogfish (Antennarius pictus) tries to attract prey using its esca (lure) Dauin, Dumaguete, Negros, Philippines. Bohol Sea, Pacific Ocean.

Alex Mustard / Painted frogfish (Antennarius pictus) courting pair - the smaller male nuzzles the swollen, egg-filled abdomen of the larger female, Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Pacifi...

Tony Wu / Painted frogfish (Antennarius pictus) in muck environment in Lembeh Strait, North Sulawesi, Indonesia.

Tony Wu / Painted frogfish (Antennarius pictus) eating another fish, Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Painted frogfish (Antennarius pictus) lying in wait for prey at night in 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.

Tony Wu / Painted frogfish (Antennarius pictus) walking across the muck on fins, Ambon, Indonesia

Terry Whittaker / Barbel (Barbus barbs) caught by angler and being released from urban river, Greater Manchester, UK May

Pascal Kobeh / Painted frogfish (Antennarius pictus) Sulu Sea, Philippines

Pascal Kobeh / Wartskin / Warty frogfish (Antennarius maculatus) Sulu Sea, Philippines

Pascal Kobeh / Painted frogfish (Antennarius pictus) Sulu Sea, Philippines

Pascal Kobeh / Painted frogfish (Antennarius pictus) in cream phase, Sulu Sea, Philippines

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

Solvin Zankl / Deep sea angler fish (Ceratias holboelli) specimen, from Atlantic Ocean near Iceland at a depth of 400m.

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.

Pascal Kobeh / Warty frogfish (Antennarius maculatus) Maldives. Indian Ocean.

Pascal Kobeh / Warty frogfish (Antennarius maculatus) mouth wide open, Maldives. Indian Ocean.

Pascal Kobeh / Warty frogfish (Antennarius maculatus) Maldives. Indian Ocean.

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

Alex Mustard / Warty frogfish (Antennarius maculatus) swimming over the seabed, by gulping in water, then closing its mouth and squirting the water out of vents by its pelvic fins. Anilao, Batangas, Luzon, Philippin...

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 / Golf-ball sized Painted frogfish (Antennarius pictus) waiting to ambush prey disguised as an orange sponge. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Golf-ball sized Painted frogfish (Antennarius pictus) yawning warning as it waits to ambush prey disguised as an orange sponge. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Golf-ball sized Painted frogfish (Antennarius pictus) waits to ambush prey disguised as an orange sponge. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Pair of Painted frogfish (Antennarius pictus) the smaller male is guarding the female prior to mating. 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.

Jeff Rotman / Goosefish (Lophius americanus) and Red Hake fish (Urophycis chuss) on deck of fishing trawler. Stellwagen Banks, New England, United States, North Atlantic Ocean

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

D. Parer & E. Parer-Cook / Sargassum Frogfish (Histrio histrio) in sargassum weed, northern Queensland, Australia

Norbert Wu / Painted Frogfish (Antennarius pictus), Bali, Indonesia

Norbert Wu / Striated Frogfish (Antennarius striatus) using lure to attract prey, West Palm Beach, Florida

Norbert Wu / Striated Frogfish (Antennarius striatus) camouflaged and using its lure to attract prey, West Palm Beach, Florida

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

Chris Newbert / Painted Frogfish (Antennarius pictus), Indonesia

David Shale / Gaping mouth of Angler Fish (Chaenophryne draco). Near Cape Verde, Atlantic Ocean.

Sue Daly / Angler Fish (Lophius piscatorius) demonstrating its camouflage, mimicking its sandy habitat. Channel Islands, UK, July.