female Pacific walrus (O. r. divergens)
wild caught in 1982
deceased on October 18th, 2022
Ancestors and Descendants
The dates listed here generally represent the time at which the measurements were published, not necessarily the date on which they were taken.
1982: 60 kg · 132 lb
1987: 500 kg · 1,102 lb
1988: 550 kg · 1,212 lb
1988: 551 kg · 1,214 lb
1988: 537 kg · 1,183 lb
1991: 750 kg · 1,653 lb
1994-Mar: 790 kg · 1,741 lb
1988: 259 cm · 8 ft 5 in
"The animals were fed 3 to 6 times per day on an average diet of 35% herring (Clupea harengus; approx. 8880 kJ/kg), 26% mackerel (Scomber scombrus; approx. 9550 kJ/kg), 9% sprat (Sprattus sprattus; approx. 10.400 kJ/kg), 2% whiting (Merlangius merlangus; approx. 4750 kJ/kg), and 28% squid (Illex spp.; approx. 1000 kJ/kg) by weight. Vitamins (Seavit>, 1 tablet per 2.5 kg of food) were added to this thawed diet." (R. A. Kastelein et al, 2000)
1986: 4,500 kg · 9,920 lb annually
1994: 7,000 kg · 15,432 lb annually
No images available at this time.
Notes and Information
The images found here have all been gathered either from this facility's official resources or news articles.
Olga was estimated to be two and a half years old upon arrival to the Dolfinarium, and had been living at SeaWorld for a year and a half.
There is the possibility that this animal's ID while housed at SeaWorld may have been SWC-Ord-8230 "Zappa", rather than the listed identifiers.
One source states this walrus arrived at Dolfinarium Harderwijk in December of 1985, although official documents and media publications refute this.
Olga was euthanized on October 18th due to quality of life concerns while suffering from various conditions which included "osteoarthritis in the shoulders, inflammation in the whiskers, [and] persistent stomach complaints". Her body was transferred to the Faculty of Veterinary Medicine at Utrecht University to undergo a necropsy.
2014-Dec-15. Ronald A. Kastelein et al. Behavior and body mass changes of a mother and calf Pacific walrus (Odobenus rosmarus divergens) during the suckling period. Retrieved from Wiley Online Library.
2022-Oct-19. Chris Ververs. Dolfinarium Harderwijk in rouw: iconische walrus Olga is niet meer. Retrieved from de Gelderlander.