The Georgia Aquarium in downtown Atlanta has sad news: It says that Taroko, a male whale shark, was euthanized on Wednesday, August 20 due to declining health after nearly 20 years at the facility.
Despite veterinary efforts, his appetite and behavior worsened, the aquarium stated on social media.
Rescued from Taiwan in 2007, Taroko inspired over 43 million visitors and contributed valuable data on whale shark biology.
A necropsy will investigate the cause of his health issues.
How Many Whale Sharks Does The Georgia Aquarium Have?
The aquarium now has one whale shark remaining in its Ocean Voyager exhibit as of August 21, 2025.
“Caring for whale sharks is a privilege, and we were honored to share Taroko with you,” officials said.
How Do Whale Sharks Typically Fare in Captivity?
Whale sharks in captivity face significant challenges, and their overall welfare is often compromised compared to their natural environment. Here are some issues to consider:
- Lifespan and Health: Whale sharks in the wild can live up to 70-100 years, but in captivity, they often experience shorter lifespans due to health issues. For example, Taroko, a whale shark at the Georgia Aquarium, was euthanized after nearly 20 years due to declining health, despite veterinary care. Common issues include reduced appetite, abnormal behavior, and difficulty adapting to confined spaces, as seen in Taroko’s case.
- Space and Environment: Whale sharks are the largest fish species, growing up to 40 feet and requiring vast ocean ranges to thrive. Even large facilities like the Georgia Aquarium’s 6.3-million-gallon Ocean Voyager exhibit cannot replicate the open ocean’s scale, food availability, or natural migration patterns. This confinement can lead to stress and physical ailments.
- Diet and Behavior: In captivity, whale sharks are fed controlled diets, often plankton or krill-based, which may not fully meet their nutritional needs. Behavioral changes, like those noted in Taroko, are common, as captivity restricts their natural foraging and migratory behaviors.
- Survival Rates: Data from facilities like the Georgia Aquarium and Japan’s Okinawa Churaumi Aquarium shows mixed outcomes. Some whale sharks adapt temporarily, but others decline rapidly. For instance, the Georgia Aquarium has lost multiple whale sharks since opening in 2005, with only one remaining as of August 2025.
- Ethical Concerns: Many marine biologists and conservationists argue that whale sharks, as filter-feeding, migratory species, are ill-suited for captivity. The stress of transport, limited space, and unnatural diets can lead to compromised health, raising ethical questions about keeping them in aquariums.
Final Word
While facilities like the Georgia Aquarium provide valuable data on whale shark biology and inspire public interest, the consensus is that captivity often fails to meet their complex needs, leading to health issues and reduced lifespans compared to the wild.