Tony Wu / Female Indo-pacific common dolphin (Delphinus delphis tropicalis) diving back into the water to catch fish. South Africa, Indian Ocean.

Jordi Chias / Atlantic spotted dolphins (Stenella frontalis) chasing fish (Trachurus trachurus) Santa Maria Island, Azores, Portugal, Atlantic Ocean

Ann & Steve Toon / Bottlenose dolphin (Tursiops truncatus) with Salmon in mouth, Fortrose, Moray Firth, Scotland, UK. May.

Espen Bergersen / Killer whales (Orcinus orca) next to fishing vessel pulling net full of herring - the whales are feeding on any fish escaping the net, outside Kvaloya, Norway. December

Espen Bergersen / Killer whales (Orcinus orca) next to fishing vessel pulling net full of herring - the whales are feeding on any fish escaping the net, outside Kvaloya, Norway. December

Espen Bergersen / Killer whales (Orcinus orca) next to fishing vessel pulling net full of herring - the whales are feeding on any fish escaping the net, outside Kvaloya, Norway. December

Espen Bergersen / Killer whales (Orcinus orca) next to fishing vessel pulling net full of herring - the whales are feeding on any fish escaping the net, outside Kvaloya, Norway. December

Espen Bergersen / Killer whales (Orcinus orca) next to fishing vessel pulling net full of herring - the whales are feeding on any fish escaping the net, outside Kvaloya, Norway. December

Espen Bergersen / Killer whale (Orcinus orca) male feeding in a school of Atlantic herring (Clupea harengus) with Herring gulls (Larus argentatus) also joining in, Kvaloya, Troms, Norway, November

Espen Bergersen / Killer whale / Orca (Orcinus orca) predating Atlantic herring (Clupea harengus) at surface, blood drops visible, Kvaloya, Troms, Norway October

Espen Bergersen / Aerial photo of a school of Atlantic herring (Clupea harengus) in shallow waters with both Humpback whales (Megaptera novaenliae) and Killer whales (Orcinus orca) feeding, coast of Kvaloya, Norway Jan...

Espen Bergersen / Aerial photo of a school of Atlantic herring (Clupea harengus) in shallow waters with both Humpback whales (Megaptera novaenliae) and Killer whales (Orcinus orca) feeding, coast of Kvaloya, Norway Jan...

Espen Bergersen / Aerial photo of a school of Atlantic herring (Clupea harengus) in shallow waters with both Humpback whales (Megaptera novaenliae) and Killer whales (Orcinus orca) feeding, as well as fishing boats, co...

Tony Wu / Killer whales / Orcas (Orcinus orca) large pod including calf traveling together while foraging on large schools of Herring (Clupea harengus) in the cold waters of northern Norway, January

Paul D Stewart / Woodcut illustration of dolphin's placenta, skull and birth by Gesner. Gesner 'Icones Animalium', 1560. Generally animals were grouped by habitat, so dolphins were thought of as fish. However Gesner d...

Doug Perrine / Mahi-mahi (Coryphaena hippurus) swimming off Kaiwi Point, Kona, Hawaii Island, USA.

Doug Perrine / Mahi-mahi (Coryphaena hippurus) swimming off Kaiwi Point, Kona, Hawaii Island, USA.

Richard Herrmann / Pacific White-sided Dolphin (Lagenorhynchus obliquidens) investigating floating Giant Kelp (Macrocystis pyrifera) with school of juvenile fish, open ocean off San Diego, California

Franco Banfi / Killer whale (Orcinus orca) pod hunting together in herring baitball (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) adult male surfacing at dusk surrounded by birds, who watch for herrings (Clupea harengus) left after they have fed, Andenes, Andoya island, North Atlantic Ocean, Norway,...

Franco Banfi / Killer whale (Orcinus orca) adult male surfacing at dusk surrounded by birds, who watch for herrings (Clupea harengus) left after they have fed, Andenes, Andoya island, North Atlantic Ocean, Norway,...

Franco Banfi / Killer whale (Orcinus orca) adult male surfacing at dusk surrounded by birds, who watch for herrings (Clupea harengus) left after they have fed, Andenes, Andoya island, North Atlantic Ocean, Norway,...

Franco Banfi / Killer whale (Orcinus orca) hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) diving and hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) surfacing to breath whilst hunting herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) pod hunting together in herring baitball (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) diving and hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) diving and hunting for herring fish (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Franco Banfi / Killer whale (Orcinus orca) hunting inside herring baitball (Clupea harengus), Andenes, Andoya island, North Atlantic Ocean, Norway, April

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing in coastal waters, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) dorsal fin above surface, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fi...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing in coastal waters, Senja, Troms county, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring...

Wild Wonders of Europe / Widstrand / Humpback whale (Megaptera novaeangliae) surfacing with fishing rope tangled around tail fluke causing wound, surfacing Orca (Orcinus orca) behind, Senja, Troms County, Norway, Scandinavia, January. Ce...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing in coastal waters, Senja, Troms county, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Ecotourist / Whale watcher photographing three surfacing Orcas / Killer whales (Orcinus orca) from boat, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed...

Wild Wonders of Europe / Widstrand / Two Orcas / Killer whales (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Two Orcas / Killer whales (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Three Orcas / Killer whales (Orcinus orca) surfacing near coast, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herrin...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, showing dorsal fin from the front, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, showing dorsal fin from the front, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of...

Wild Wonders of Europe / Widstrand / Two Orcas / Killer whales (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing near coast with sun low over mountains, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large number...

Wild Wonders of Europe / Widstrand / Two whale watchers on small boat with Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing near coast, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Four Orcas / Killer whales (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Whale watcher on boat photographing Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers o...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Two Orcas / Killer whales (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Pedro Narra / Bottlenose Dolphin, (Tursiops truncatus) catching fish, Sado Estuary, Portugal

Jeff Rotman / Child observing Yellowspotted pufferfish (Chilomycterus spilostylus) at night, inflated with water, Dolphin Reef, Eilat, Israel, Red Sea. Model released. Model released.

Pete Oxford / Long-beaked common dolphins (Delphinus capensis) feeding in Sardines, (Sardinops sagax) with snorkeller behind, Eastern Cape, South Africa

Pete Oxford / Long-beaked common dolphins (Delphinus capensis) feeding on Sardines, (Sardinops sagax) Eastern Cape, South Africa

Espen Bergersen / Humpback whales (Megaptera novaeangliae) and killer whales / orcas (Orcinus orca) feeding on herring (Clupea harengus). Andfjorden, close to Andoya, Nordland, Northern Norway. January.

Espen Bergersen / Humpback whales (Megaptera novaeangliae) and killer whales / orcas (Orcinus orca) feeding on herring (Clupea harengus). Andfjorden, close to Andoya, Nordland, Northern Norway. January.

Angelo Gandolfi / Bottlenose dolphins (Tursiops truncatus) by fisherman throwing net. Santa Catarina State, Brazil, September. At Laguna lagoon some bottlenose dolphins drive fish towards fishermen. When the fishermen...

Angelo Gandolfi / Bottlenose dolphins (Tursiops truncatus) by fisherman throwing net. Santa Catarina State, Brazil, September. At Laguna lagoon some bottlenose dolphins drive fish towards fishermen. When the fishermen...

Angelo Gandolfi / Bottlenose dolphins (Tursiops truncatus) by fishing boat, fisherman throwing net. Santa Catarina State, Brazil, September. At Laguna lagoon some bottlenose dolphins drive fish towards fishermen. When...

Angelo Gandolfi / Bottlenose dolphins (Tursiops truncatus) by fishing boat, Santa Catarina State, Brazil, September. At Laguna lagoon some bottlenose dolphins drive fish towards fishermen. When the fishermen throw thei...

Roland Seitre / Indo-pacific Bottlenose Dolphin (Tursiops aduncus) pod hunting, South Australia, Australia

Roberto Rinaldi / Dolphin fish (Coryphaena hippurus) and Wahoos (Acanthocybium solandri) caught during big game fishing, Reunion Island, Indian Ocean.

Chris & Monique Fallows / Common dolphin (Delphinus delphis) feeding on Sardines (Sardinops sagax) East London, South Africa

Chris & Monique Fallows / Common dolphin (Dephinus delphis) and Cape Gannet (Morus capensis) feeding on bait fish, False Bay, Cape Town, South Africa.

Chris & Monique Fallows / Mahi mahi (Coryphaena hippurus) portrait, Mozambique Channel, Indian Ocean

Jeff Rotman / Close up of skin of a dolphinfish (Coryphaena hippuris). Cocos Island, Costa Rica, Pacific Ocean.

Pedro Narra / Bottlenose Dolphin (Tursiops truncatus) playing with fish at surface, Sado Estuary, Portugal

Pete Oxford / Long-beaked Common Dolphin (Delphinus capensis) pod and diving Cape Gannet (Morus capensis) hunting Pacific Sardines (Sardinops sagax), Eastern Cape, South Africa

Pete Oxford / Long-beaked Common Dolphin (Delphinus capensis) pair hunting Pacific Sardines (Sardinops sagax), Eastern Cape, South Africa

Pete Oxford / Long-beaked Common Dolphin (Delphinus capensis) hunting Pacific Sardines (Sardinops sagax), Eastern Cape, South Africa

Pete Oxford / Long-beaked Common Dolphin (Delphinus capensis) pair and diving Cape Gannet (Morus capensis) hunting Pacific Sardines (Sardinops sagax), Eastern Cape, South Africa

Hiroya Minakuchi / Atlantic Spotted Dolphin (Stenella frontalis) trio with Remoras (Remora sp), Bahamas, Caribbean

Hiroya Minakuchi / Atlantic Spotted Dolphin (Stenella frontalis) juvenile carrying fish prey, Bahamas, Caribbean

Mark Carwardine / Common bottlenose dolphin (Tursiops truncatus) breaching with two Suckerfish / Remora attached, Baja California, Sea of Cortez (Gulf of California), Mexico

Mark Carwardine / Common dolphin (Delphinus sp) breaching with Remora / Whalesucker fish attached, Baja California, Sea of Cortez (Gulf of California), Mexico

Mark Carwardine / Amazon / Pink river dolphin / Boto {Inia geoffrensis} local villager feeding wild animal fish, Rio Negro, Amazon, Brazil Threatened species (IUCN Red List)

Mark Carwardine / Amazon / Pink river dolphin / Boto {Inia geoffrensis} local villager feeding wild animal fish, Rio Negro, Amazon, Brazil Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal breaching, jumping for fish Threatened species (IUCN Red List)

Mark Carwardine / Amazon / Pink river dolphin / Boto {Inia geoffrensis} local villager feeding wild animal fish, Rio Negro, Amazonia, Brazil Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal breaching and feeding, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal being fed by local villager, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal being fed fish by local villager, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal breaching with fish in beak, Threatened species (IUCN Red List)

Mark Carwardine / Dusky dolphin killed in dolphin hunt for sale in market, Peru {Lagenorhynchus obscurus}

Martha Holmes / Sediment rising from the sea bed as a result of a bottlenose dolphin (Tursiops truncatus) beating its tail down to trap fish. Beahviour known as mud-ringing. Florida Bay, USA. August 2008. Taken on...

Martha Holmes / Sediment rising from the sea bed as a result of a bottlenose dolphin (Tursiops truncatus) beating its tail down to trap fish. Beahviour known as mud-ringing. Florida Bay, USA. August 2008. Taken on...

Doc White / Amazon river dolphin (Inia geoffrensis) with fish prey in mouth, Rio Negro, Amazonia, Brazil

Roland Seitre / Indian Ocean Bottlenose Dolphins (Tursiops aduncus) feeding on bait fish. Whyalla, South Australia.

Roland Seitre / Yang Tze River Dolphin (Lipotes vexillifer) feeding on fish. Captive 'Qi Qi'. Wuhan research and rehabilitation centre, 2001.

Pete Oxford / Bottlenose dolphin (Tursiops truncatus) with trainer in Aquarium, Islas del Rosario, off Cartagena (Cartagena de los Indios) Atlantico Province, Columbia, captive

Pedro Narra / Bottlenose dolphin (Tursiops truncatus) catching a Dover sole (Solea vulgaris) Sado Estuary, Portugal, October

Pedro Narra / Bottlenose dolphin (Tursiops truncatus) catching a Flatheadmullet (Mugil cephalus) Sado Estuary, Portugal, May