A 26-year-old beluga named Osiris has died at Chicago's Shedd Aquarium following her relocation from Marineland in Niagara Falls. This marks the fourth death among whales moved from the Ontario park as part of a massive international transfer program.
The sudden decline of Osiris at Shedd Aquarium
Osiris, a 26-year-old female beluga, passed away Monday morning at the Shedd Aquarium in Chicago. According to a statement from the Shedd Aquarium, the whale's condition deteriorated rapidly after veterinary teams observed sudden changes in her respiratory patterns and behavior.
The death of Osiris follows a period of medical intervention where the whale had been receiving fluids and medication to address inconsistent eating habits. While the Shedd Aquarium noted recent improvements in her condition, the suddenness of her decline has prompted the facility to conduct a necropsy to determine the exact cause of death.
A mounting death toll spanning from Chicago to Spain
The loss of Osiris is part of a troubling pattern involving the 30 belugas and four dolphins relocated from Marineland in Niagara Falls. As reported by The Canadian Press, two other whales, Rain and Peekachu, died at the Shedd Aquarium shortly after their arrival, and another whale, Jelly Bean, died at Oceanografic in Spain last week.
This mortality rate adds to a grim history at the original Marineland facility, where 19 belugas and one killer whale died between 2019 and 2025. While Marineland has suggested that new federal regulations contributed to those deaths, the current wave of fatalities is occurring at the new host institutions. The recent deaths at host aquariums are compounded by the loss of Beethoven, a longtime resident beluga at the Shedd Aquarium, who also passed away recently.
The failed China deal and Minister Thompson's intervention
The massive relocation effort was a last resort for Marineland, which claimed it lacked the funds to continue caring for its animals. the park had initially attempted to sell its entire pod of 30 belugas to the Chimelong Ocean Kingdom in China—the world's largest aquarium according to Guinness World Records—but Fisheries Minister Joanne Thompson blocked the transaction .
Minister Thompson's decision was based on a 2019 federal law that banned the captivity, breeding, and performance of whales and dolphins in Canada. although Marineland's whales were grandfathered under this law, the minister determined that a sale to China was not in the best interest of the animals and was inconsistent with federal mandates.
What remains uncertain for the whale named Secord
Significant questions remain regarding the health of the remaining whales, particularly Secord, who is currently under observation at the Shedd Aquarium. The Shedd Aquarium reported in a recent blog post that Secord has struggled to maintain a consistent appetite despite various feeding approaches and the offering of different types of herring to gauge her preference.
It remains unclear whether the stress of the international transfer or underlying health issues from their time at Marineland are driving these recent deaths. Furthermore, while veterinarians from both Marineland and the receiving aquariums cleared the animals for transport, the rapid decline of multiple whales suggests that the initial health assessments may have been insufficient.
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