Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) portrait, captive. Kona, Hawaii. Central Pacific Ocean.

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) portrait, captive. Kona, Hawaii. Central Pacific Ocean. Digitally manipulated image.

Sergio Hanquet / Angel shark (Squatina squatina) resting on sea floor. Tenerife, Canary Islands.

Sergio Hanquet / Angel shark (Squatina squatina) resting on sea floor. Tenerife, Canary Islands.

Pascal Kobeh / Angel shark (Squatina squatina) buried in the sand, Canary Islands

Pascal Kobeh / Angel shark (Squatina squatina) burried in the sand, Canary Islands

Pascal Kobeh / Angel shark (Squatina squatina) swimming above the sandy bottom with divers in the background, Canary Islands

Pascal Kobeh / Angel shark (Squatina squatina) swimming above the reef, Canary Islands

Pascal Kobeh / Angel shark (Squatina squatina) laying on the sand, Canary Islands

Pascal Kobeh / Two angel sharks (Squatina squatina). One is laying on the sand while the other is completely burried in the sand. We can hardly make out its shape, Canary Islands

David Fleetham / Pacific angel shark (Squatina californica) resting on sea floor. Santa Barbara Island, California, USA.

David Fleetham / Pacific angel shark (Squatina californica) swimming above sea floor. Santa Barbara Island, California, USA.

Tony Wu / Japanese angelshark (Squatina japonica) engaged in ambush predation, leaping out of the sand to catch a small silver-stripe round herring (Spratelloides gracilis). Japan, Pacific.

Tony Wu / Japanese angelshark (Squatina japonica) engaged in ambush predation, leaping out of the sand to catch a small silver-stripe round herring (Spratelloides gracilis). The cloud of sand thrown up by the s...

Tony Wu / Japanese angelshark (Squatina japonica) engaged in ambush predation, leaping out of the sand to catch a small silver-stripe round herring (Spratelloides gracilis). The shark's extended jaws are clearl...

Doug Perrine / Kitefin shark (Dalatias licha) jaws and teeth on display at Oceanographic Museum of Monaco, Principality of Monaco

Doug Perrine / Close-up of the skin of a bioluminescing Pygmy shark, (Euprotomicrus bispinatus) showing glowing blue photophores (light organs). Captive. Kona, Hawaii, Central Pacific.

Doug Perrine / Bioluminescing Pygmy shark, (Euprotomicrus bispinatus) showing glowing blue photophores (light organs). Captive. Kona, Hawaii, Central Pacific.

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) captive, bioluminescing. Captive, Kona, Hawaii, Central Pacific Ocean.

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) showing head with teeth, eyes, and nares or nostrils. Captive, Kona, Hawaii, USA. Central Pacific Ocean.

Doug Perrine / Pygmy shark (Euprotomicrus bispinatus) held in human hand, Kona, Hawaii. Central Pacific.

Alex Mustard / Pacific angelshark (Squatina californica) camouflaged in the sand waiting to ambush prey. Santa Barbara Island, Channel Islands. California, USA. North East Pacific Ocean. September.

Sergio Hanquet / Angelshark (Squatina squatina) burying itself in the sand, ready to ambush prey that swims past, Tenerife, Canary Islands, Atlantic ocean. Critically Endangered.

David Fleetham / Pacific angel shark (Squatina californica) resting on the sea floor, Santa Barbara Island, California, USA. July.

David Fleetham / Pacific angel shark (Squatina californica) at rest on sandy ocean floor. Santa Barbara Island, California, USA.

Sergio Hanquet / Angelshark (Squatina squatina) in sand on seafloor, Tenerife, Canary Islands.

Sergio Hanquet / Angel shark (Squatina squatina) with diver at night, Tenerife, Canary Islands.

Sergio Hanquet / Angel shark (Squatina squatina) on sea floor, Tenerife, Canary Islands.

Doug Perrine / Short-finned pilot whale (Globicephala macrorhynchus) with deep crater wound from a recent bite from a cookie cutter shark ( Isistius brasiliensis) as well as a number of round scars from healed earli...

Martin Camm / Carwardine / Smalltooth cookiecutter shark (Isistius brasiliensis) adult Open mouth No more than 15 illustrations by Martin Camm, Rebecca Robinson and/or Toni Llobet to be used in a single project or boo...