Atlantic Spotted Dolphin (Stenella frontalis) leaping trio Azores

Short-beaked Common Dolphin (Delphinus Delphis) juvenile Azores

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

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

Pod of Atlantic spotted dolphins porpoising at surface (Stenella frontalis) Azores, Atlantic Ocean

Atlantic Spotted Dolphin (Stenella frontalis) group In front of Pico. Azores

Short-Beaked Common Dolphin, Delphinus delphis, mother and calf leaping together off the Azores Islands

Two Common dolphins porpoising (Delphinus delphis) Barra Head, Scotland, UK

Common dolphin porpoising (Delphinus delphis) Barra Head, Scotland, UK

Short-beaked Common dolphins (Delphinus delphis) Gibraltar, Mediterranean

Short-beaked Common Dolphin (Delphinus delphis) Pembrokeshire, Wales, UK

Short-beaked Common Dolphin (Delphinus delphis) Pembrokeshire, Wales, UK

Short-beaked Common Dolphin (Delphinus delphis). Pembrokeshire, Wales, UK

Short-beaked Common Dolphin (Delphinus delphis) bow riding. Pembrokeshire, Wales, UK

Short-beaked Common Dolphin (Delphinus delphis) Pembrokeshire, Wales, UK

Common Dolphins (Delphinus delphis). A large group travelling in Gulf of California.

Common dolphins (Delphinus delphis) surfacing at speed in very calm waters. Eye, beak, flipper and dorsal fin visible above the surface. Hebrides, West coast of Scotland.

Scientist lying on 10ft long bowsprit of research yacht, Silurian, to photo-identify common dolphins. Hebrides, Scotland.

Common dolphins (Delphinus delphis) surfacing at speed with eye visible above the surface. Hebrides, Scotland.

Pod of Common dolphins surfacing (Delphinus delphis) Azores, Atlantic Ocean