Bottlenose dolphin (Tursiops truncatus) Azores

Short-fin Pilot Whale, Globicephala macrorhynchus, swimming off the Azores Islands

Short-finned pilot whale surfacing (Globicephala macrorhynchus) Azores, Atlantic Ocean

Short-fin Pilot Whale (Globicephala macrorhynchus) Azores

Risso's dolphin surfacing (Grampus griseus) Azores, Atlantic Ocean

Short-fin Pilot Whale (Globicephala macrorhynchus) Azores

Short-Beaked Common Dolphin, Delphinus delphis, leaping at the surface off the Azores Islands, showing foetal folds

Risso's dolphin surfacing (Grampus griseus) Azores, Atlantic Ocean

Atlantic spotted dolphin surfacing (Stenella frontalis) Azores, Atlantic Ocean

Pod of Risso's dolphins surfacing (Grampus griseus) Azores, Atlantic Ocean

Atlantic Spotted Dolphin, (Stenella frontalis). Azores

Atlantic Spotted dolphin, Stenella frontalis, leaping in the Azores

Minke whale (Balaenoptera acutorostrata) surfacing, Hebrides, Scotland

Aerial view of Fin whale (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Aerial view of Fin whales (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Fin whale (Balaenoptera physalus) lunge feeding

Aerial view of Fin whale (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Aerial view of Fin whales (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Adult Fin Whale (Balaenoptera physalus) surfacing in the lower Gulf of California (Sea of Cortez), Mexico.

Bryde's whale arching back ready to dive (Balaenoptera edeni) Drake Bay, Costa Rica

Illustration of Fin whale (Balaenoptera physalus) showing characteristic markings on side

Finback whale (Balaenoptera physalus) might be seen alone or in pairs but often form groups of more than a dozen animals in order to hunt fish. St. Lawrence estuary, Canada (rr)

Fin whale (Balaenoptera physalus) showing the chevron markings on its flanks. Bay of Biscay, SW Europe.

Fin whale (Balaenoptera physalus) head passing close beneath a boat. Gulf of California.

Flora & Fauna - line art - a 19th century engraving Animal - mammal - the order cetacea Dolphin Dolphins are actually small, streamlined whales. They appear in the writings of Aristotle, Aesop, Herodotus, and Pliny wherein they began to gain their now m

Flora & Fauna - line art - a 19th century engraving Animal - mammal - the order cetacea Dolphin Dolphins are actually small, streamlined whales. They appear in the writings of Aristotle, Aesop, Herodotus, and Pliny wherein they began to gain their now m

Flora & Fauna - line art - a 19th century engraving Animal - mammal - the order cetacea Dolphin Dolphins are actually small, streamlined whales. They appear in the writings of Aristotle, Aesop, Herodotus, and Pliny wherein they began to gain their now m

Two killer whales swim near an iceberg in the Arctic Ocean.

Two killer whales swim into an ocean inlet.

Fin Whale (Balaenoptera physalus) dorsal fin. Azores