TaxonHub
Risso's dolphin

Risso's dolphin

Grampus griseus

A large, robust marine mammal characterized by a distinctive grey coloration and heavily scarred body, primarily inhabiting deep offshore waters worldwide.

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Risso's dolphin
Risso's dolphin
Risso's dolphin
Risso's dolphin
Risso's dolphin
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Ecology & Habitat

Habitat

Oceanic and continental slope regions, preferring depths between 200-1000 meters, found in temperate and tropical waters globally, including the Atlantic, Pacific, and Indian Oceans.

Ecological Role

Key predator in marine ecosystems, controlling populations of squid and small fish, and serving as a critical component of oceanic food webs and marine biodiversity.

Morphology

  • SKIN COAT Predominantly grey with extensive white scarring from intraspecific interactions and parasitic encounters
  • LIMBS WINGS Robust dorsal fin, broad fluke for powerful swimming, pectoral flippers for precise maneuvering
  • HEAD SENSORY Large melon for echolocation, well-developed acoustic navigation capabilities, limited external ear structures
  • BODY STRUCTURE Robust, stocky body with length 3.8-4.3 meters, weight 300-500 kg, blunt rounded head with no pronounced beak
Data Source: TaxonHub Database
Image Credit: Laura (Laney) White (USGS Western Ecological Research Center)
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Related Species in Delphinidae