Species: Grampus griseus
2.6 to 5 m, weighing 300 to 500 kg
Up to 35 years
A pelagic species, Risso's Dolphin lives at depths between 400 and 1000 metres. It can occasionally be seen near the coast. It migrates between summer and winter according to variations in water temperature. It is found in temperate, subtropical and tropical oceans.
It gives birth to a calf every 2 to 4 years after a 14-month gestation period.
The Risso's Dolphin is a carnivore and feeds on molluscs, fish, crustaceans and krill.
Morphological characteristics for distinction at sea
- Head: rounded with a distinct melon and an undiscernable beak, presence of a concave groove between the mouth and the melon
- Fins and flippers: big sickle-shaped dorsal fin, long pointed and curved pectoral fins, pointed caudal peduncle with a pronounced central notch
- Colouring: silver-grey to almost black back, white areas on belly, the body increasingly whitens with age with an accumulation of white linear scars mainly on the back and flanks