Atlantic Spotted Dolphin (Stenella frontalis) leaping trio Azores

Two Bottlenose dolphins surfacing in tandem (Tursiops truncatus) Azores, Atlantic Ocean

Two Bottlenose dolphins surfacing (Tursiops truncatus) Azores, Atlantic Ocean

Group of Atlantic spotted dolphins surfacing (Stenella frontalis) Azores, Portugal

Bottlenose dolphin surfacing (Tursiops truncatus) Azores, Atlantic Ocean

Risso's dolphin, Grampus griseus, shoots out of a wave in the Azores

Pair of Risso's Dolphin, Grampus griseus, swimming off the Azores. Note the groove in the melon

Two Atlantic spotted dolphins surfacing (Stenella frontalis) Azores, Portugal

Two Common dolphins surfacing (Delphinus delphis) Azores, Atlantic Ocean

Short-beaked Common Dolphin (Delphinus delphis) Azores

Atlantic spotted dolphin and baby surfacing (Stenella frontalis) Azores, Portugal

Pod of Bottlenose dolphins surfacing (Tursiops truncatus) Azores, Atlantic Ocean

Risso's dolphin (Grampus griseus) lost inside Monterey harbour, Monterey Bay, California, USA

Risso's Dolphin (Grampus griseus). Pembrokeshire, Wales, UK

Risso's dolphins (Griseus grampus) competing at surface, Monterey Bay, California, USA

Risso's dolphins (Grampus griseus) surfacing in tight group showing scarred backs and fins. Canary Islands, North Atlantic.

Risso's dolphin (Grampus griseus) spy hop. National marine sanctuary, Monterey bay, California Pacific ocean, USA.

Risso's dolphin (Grampus griseus) surfacing at speed with natural scarring visible. Monterey Bay, California, USA

Risso's dolphin (Grampus griseus) with its eye and blow visible and characteristic scarring over its body and dorsal fin. Hebrides, Scotland.

Pod of Risso's dolphins (Grampus griseus) travelling together. Monterey Bay, California, USA.

Risso's dolphin (Grampus griseus) three calves playing, fatal folds, teeth and tail fluke are clearly visible Monterey Bay, California, USA, Pacific Ocean, National Marine Sanctuary

Risso's dolphin, Grampus griseus, double breach or tandem breach, high leap, Monterey bay California, USA, Pacific ocean, national marine sanctuary

Risso's dolphin (Grampus griseus) mother and calf, eye, mouth and fatal folds are clearly visible. Monterey Bay, California, USA, Pacific Ocean, National Marine Sanctuary

Risso's dolphin, Grampus griseus, double breach or tandem breach, high leap, Monterey bay California, USA, Pacific ocean, national marine sanctuary

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