It is hard to guess what a Risso’s dolphin weights. But we have the answer:
An adult Risso’s dolphin (Grampus griseus) on average weights 387.25 kg (853.74 lbs).
The Risso’s dolphin is from the family Delphinidae (genus: Grampus). They can live for up to 20 years. When reaching adult age, they grow up to 11 cm (0′ 5″).
As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.
Risso’s dolphin (Grampus griseus) is the only species of dolphin in the genus Grampus. It is commonly known as the Monk dolphin among Taiwanese fishermen. Some of the closest related species to these dolphins include: pilot whales (Globicephala spp.), pygmy killer whales (Feresa attenuata), melon-headed whales (Peponocephala electra), and false killer whales (Pseudorca crassidens).
Animals of the same family as a Risso’s dolphin
We found other animals of the Delphinidae family:
- Short-beaked common dolphin bringing 79.29 kilos (174.8 lbs) to the scale
- Heaviside’s dolphin bringing 40 kilos (88.18 lbs) to the scale
- False killer whale bringing 1360 kilos (2998.28 lbs) to the scale
- Irrawaddy dolphin bringing 190 kilos (418.88 lbs) to the scale
- Commerson’s dolphin bringing 72.4 kilos (159.61 lbs) to the scale
- Striped dolphin bringing 142.05 kilos (313.17 lbs) to the scale
- Northern right whale dolphin bringing 113 kilos (249.12 lbs) to the scale
- Hourglass dolphin bringing 110 kilos (242.51 lbs) to the scale
- Tucuxi bringing 42.82 kilos (94.4 lbs) to the scale
- Pacific white-sided dolphin bringing 109.85 kilos (242.18 lbs) to the scale
Animals with the same weight as a Risso’s dolphin
As a comparison, here are some other animals that weight as much as the Grampus griseus:
- Leopard seal with a weight of 352.84 kilos (777.88 lbs)
- Muskox with a weight of 312.67 kilos (689.32 lbs)
- Grévy’s zebra with a weight of 405.5 kilos (893.97 lbs)
- Horse with a weight of 401.8 kilos (885.82 lbs)
- Polar bear with a weight of 373.35 kilos (823.09 lbs)
- Weddell seal with a weight of 400 kilos (881.85 lbs)
- Plains zebra with a weight of 400 kilos (881.85 lbs)
- Amazonian manatee with a weight of 418 kilos (921.53 lbs)
- Steller sea lion with a weight of 383.23 kilos (844.88 lbs)
- Pygmy sperm whale with a weight of 431.25 kilos (950.74 lbs)
Animals with the same life expectancy as a Risso’s dolphin
Completely different animals, but becoming as old as a Risso’s dolphin:
- Common marmoset with an average maximal age of 16.75 years
- Eastern grey kangaroo with an average maximal age of 24 years
- Nilgiri tahr with an average maximal age of 17.25 years
- Common wallaroo with an average maximal age of 24 years
- South American coati with an average maximal age of 17.67 years
- Dall sheep with an average maximal age of 16 years
- Binturong with an average maximal age of 22.67 years
- Scimitar oryx with an average maximal age of 20.42 years
- White-faced saki with an average maximal age of 20.67 years
- Golden-backed uakari with an average maximal age of 18 years