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

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

Risso's Dolphin, Grampus griseus, leaping off the Azores Islands

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

Risso's Dolphin, Grampus griseus, breaching off the Azores Islands

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

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

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

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

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

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) close look at a calf surfacing next to its mother, fetal folds are visible. Monterey Bay, California, USA, Pacific Ocean, National Marine Sanctuary

Male Risso's dolphins (Grampus griseus) competing for female.