Definition of Risso's dolphin in US English:

Risso's dolphin


  • A gray dolphin that has long black flippers and a rounded snout with no beak, living mainly in temperate seas.

    Grampus griseus, family Delphinidae

    Also called grampus
    • ‘At up to 4m in length, Risso's dolphin is larger than most of its companion species.’
    • ‘And a Risso's dolphin, a stout-bodied species without a pronounced beak, is regularly sighted off the Welsh coast.’
    • ‘A pod of Risso's dolphins has been attracting considerable attention in the waters around Lamb Holm for the past few days.’
    • ‘The area is home to bottlenose dolphins, Risso's dolphins and false killer whales, Ting said, adding, ‘sometimes rare sperm whales and humpback whales are also seen.’’
    • ‘Another large grey species, the Risso's dolphin, is seen occasionally off the Welsh coast and more commonly off Scotland.’


Late 19th century: named after Giovanni A. Risso (1777–1845), Italian naturalist.


Risso's dolphin

/ˌrisōz ˈdälfin/