Spotted Dolphin, Stenella frontalis, pair surfacing off the Azores Islands

Short-Beaked Common Dolphin, Delphinus delphis, trio leaping off the Azores Islands

Rough Tooth Dolphin (Steno bredanensis) mother and calf. Azores

Bottlenose Dolphin, Tursiops truncatus, mother and calf pair leaping at the surface in the Azores

Risso's dolphin (Grampus griseus) breaching, Monterey Bay, California, USA

Risso's dolphin (Grampus griseus) close look at a calf surfacing and blowing Monterey Bay, California, USA, Pacific Ocean, National Marine Sanctuary

Risso's dolphin (Grampus griseus) breaching, Monterey Bay, California, Pacific Ocean, USA, National Marine Sanctuary

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

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, double breach or tandem breach, high leap, Monterey bay California, USA, Pacific ocean, national marine sanctuary

Risso's dolphins (Grampus griseus) sunbathing on the surface. Woodhouse Reef, Sharm El Sheikh, South Sinai, Red Sea, Egypt.

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

Mixed pod of Striped, Common and Risso's dolphins (Stenella coeruleoalba, Delphinus delphis, Grampus griseus) the only permanent symbiosis of these species to be recorded, Gulf of Corinth, Greece.

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

Risso's Dolphin (Grampus griseus) mother and calf Azores