Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

David Fleetham / Tiny Whitespotted bamboo shark (Chiloscyllium plagiosum) formed inside egg casing, Philippines.

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Tailfin of Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Doug Perrine / Copper sharks / Bronze whaler (Carcharhinus brachyurus) and Little eastern tuna {Euthynnus affinis} feeding on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off t...

Doug Perrine / Copper shark / Bronze whaler (Carcharhinus brachyurus) feeding on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off the east coast of South Africa at Mboyti, Trans...

Luis Quinta / Devil ray {Mobula tarapacana} with remora, Azores, Atlantic

Doug Perrine / Copper sharks / Bronze whaler (Carcharhinus brachyurus) feeding on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off the east coast of South Africa at Mboyti, Tran...

Doug Perrine / Pyjama shark / Striped catshark {Poroderma africanum} Cape of Good Hope, South Africa

David Fleetham / Undescribed species of Electric ray (Torpedo sp) can put out as much as 220 volts if disturbed, found only in Horseshoe Bay, off the island of Rinca in the Komodo National Park, Indonesia.

Franco Banfi / Devil ray (Mobula tarapacana) profile portrait, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Devil ray (Mobula tarapacana) viewed from below, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Devil ray (Mobula tarapacana) viewed from below, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Devil ray (Mobula tarapacana) viewed from below, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Devil ray (Mobula tarapacana) viewed from below, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Franco Banfi / Devil ray (Mobula tarapacana) viewed from below, Princess Alice Bank, Pico Island, Azores, Portugal, Atlantic Ocean

Mark Carwardine / Watching a Great white shark (Carcharodon carcharias) from inside a diving cage, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Cage-diving with Great white shark (Carcharodon carcharias) Guadalupe Island, Mexico (North Pacific) Shark taking bait in front of cage

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific) With mackerel scad

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) taking bait underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) and Californian sealion (Zalophus californianus) Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) swimming at surface, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Georgette Douwma / Electric ray / Numbfish (Narcine sp.) on sandy seabed, active at night. The electric organs of narcinids can produce up to 37 volts. Rinca, Komodo National Park, Indonesia.

Doug Perrine / Copper sharks / Bronze whaler (Carcharhinus brachyurus) feeding on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off the east coast of South Africa at Mboyti, Tran...

Doug Perrine / Copper sharks / Bronze whaler (Carcharhinus brachyurus) feeding and Cape gannets {Sula capensis}diving on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off the eas...

Doug Perrine / Copper sharks / Bronze whaler (Carcharhinus brachyurus) feeding on a baitball of Sardines / Pilchards (Sardinops sagax) during the annual Sardine Run off the east coast of South Africa at Mboyti, Tran...

Luis Quinta / Devil ray {Mobula tarapacana} Azores, Atlantic

Nature Production / Close up of mouth sucker of Sand lamprey {Lampetra / Lethenteron reissneri} Hokkaido, Japan

Nature Production / Sand Lamprey {Lampetra / Lethenteron reissneri} in a river, Hokkaido, Japan

Doug Perrine / Pyjama shark / Striped catshark {Poroderma africanum} Cape of Good Hope, South Africa

Doug Perrine / Butterfly / Diamond ray {Gymnura natalensis} camouflaged on seabed, captive, from Southern Africa

Doug Perrine / Biscuit / False thornback skate {Raja straeleni} captive, from West to South Africa

Doug Perrine / Smoothhound shark {Mustelus mustelus} captive, from South Africa

Doug Perrine / Whitespotted bamboo shark {Chiloscyllium plagiosum} Malapascua Island, Cebu, Philippines

David Shale / Close up of eye of Great lanternshark (Etmopterus princeps), deep sea Atlantic ocean

David Shale / Close up of eye of Great lanternshark (Etmopterus princeps), deep sea Atlantic ocean

David Shale / Close up of dorsal spine of Great lanternshark (Etmopterus princeps), deep sea Atlantic ocean

David Fleetham / Galapagos bullhead shark (Heterodontus quoyi), resting on sandy seabed, Galapagos Islands.

Paul D Stewart / Woodcut of Common electric ray (Torpedo torpedo) with old colouring. From Conrad Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. The torpedo or electric ray had been well know by...

Ian Coleman / Illustration of Smoothhound (Mustelus mustelus), Triakidae.