Risso's dolphin (Grampus griseus) speed swimming or porpoising at surface, Monterey Bay, California, USA

Risso's dolphin (Grampus griseus) showing typical percussive behaviour: repeatedly leaping out of the water to land with a loud splash. Hebrides, Scotland.

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 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) with its eye and blow visible and characteristic scarring over its body and dorsal fin. Hebrides, Scotland.

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

Risso's dolphin (Grampus griseus) close look at a calf surfacing next to its mother, fetal folds are visible. Monterey Bay, California, USA, Pacific Ocean, National Marine Sanctuary

Rissos dolphin, Grampus griseus, double breach or tandem breach, high leap, one animal makes a complete flip or somersault, Monterey bay California, USA, Pacific ocean, national marine sanctuary

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