Why Can't Aquariums Keep Great White Sharks Alive?

TL;DR

Great white sharks cannot survive in aquariums due to their need for spacious environments and specific water conditions. While the Monterey Bay Aquarium successfully kept a juvenile shark alive for over six months, later attempts led to physical harm and ethical concerns, resulting in a halt to further efforts. The challenges of captivity and resource demands have prevented aquariums from showcasing great whites in recent years.

Transcript

There are some shark species that seem to do okay in aquariums. You’ll see a lot of nurse sharks, zebra sharks, some reef sharks and sand tiger sharks. But not the great white. For decades, aquariums have tried to contain the world’s largest predatory fish. Institutions like Marineland, SeaWorld and the Steinhart Aquarium repeatedly took in white s... Read More

Key Insights

• Great white sharks have consistently failed to survive in captivity due to their need for large, open spaces and specific environmental conditions.
• Monterey Bay Aquarium made significant efforts to house great whites, achieving temporary success by keeping a shark alive for over six months.
• Juvenile great white sharks are easier to manage in captivity as they are smaller and have different dietary needs compared to adults.
• The Monterey Bay Aquarium developed a unique system involving a massive tank and ocean pen to acclimate sharks before moving them to the aquarium.
• The captive environment often causes physical harm to great white sharks, such as sores from tank walls, leading to ethical concerns.
• Despite the challenges, public displays of great whites can inspire ocean conservation and awareness about marine life threats.
• Efforts to keep great whites in captivity are resource-intensive and have not been attempted since 2011 due to high costs and ethical issues.
• The Biodiversity Heritage Library offers resources on marine biodiversity, including historical perspectives on sharks, which have existed for millions of years.

Questions & Answers

Q: Why have aquariums struggled to keep great white sharks alive?

Great white sharks require vast open spaces and specific environmental conditions to thrive. In captivity, they often suffer from physical harm due to tank walls and struggle to adapt to the confined environment. Additionally, they need constant water flow over their gills to breathe, which is difficult to maintain in a tank.

Q: How did the Monterey Bay Aquarium succeed in keeping a great white shark alive?

The Monterey Bay Aquarium succeeded by using a million-gallon, egg-shaped tank designed for open-ocean animals. They captured juvenile sharks, which are easier to manage, and acclimated them in a large ocean pen before moving them to the aquarium. This process allowed them to monitor and adjust the shark's environment carefully.

Q: What were the ethical concerns associated with keeping great white sharks in captivity?

Ethical concerns included the physical harm sharks experienced, such as sores from tank walls, and the unnatural conditions of captivity that did not meet the sharks' needs for open space. Critics argued that the stress and injuries inflicted on the sharks outweighed the educational benefits of public displays.

Q: What role did public awareness play in the Monterey Bay Aquarium's program?

Public awareness was a significant factor, as displaying live great white sharks helped inspire ocean conservation and educate the public about marine life threats. The aquarium aimed to connect people with the ocean environment and encourage them to become stewards of marine conservation.

Q: Why did the Monterey Bay Aquarium stop its great white shark program?

The program was halted due to the high resource demands and ethical concerns related to the physical harm experienced by the sharks. Despite some success, the initiative was costly and faced criticism for the impact on the animals' well-being, leading to its discontinuation in 2011.

Q: What innovative techniques did the Monterey Bay Aquarium use for their shark program?

The aquarium used a combination of a massive, specially designed tank and a large ocean pen to acclimate sharks before moving them to the aquarium. They also employed custom-built transport tanks with life support systems to ensure the sharks' survival during relocation.

Q: How did the physical environment of the tank affect the great white sharks?

The physical environment of the tank caused harm to the sharks, such as visible sores from bumping into the walls. The confined space did not allow for the natural swimming patterns of great whites, leading to stress and physical injuries that raised ethical concerns.

Q: What resources are available for learning more about marine biodiversity and sharks?

The Biodiversity Heritage Library offers extensive resources on marine biodiversity, including historical perspectives on sharks. The library's collection includes scanned pages from books on biodiversity, providing valuable information on the history and evolution of marine species, including sharks.

Summary & Key Takeaways

• Great white sharks have historically struggled to survive in aquarium settings, with most attempts ending in failure. The Monterey Bay Aquarium achieved a breakthrough by keeping a juvenile shark alive for over six months, using innovative techniques and a large, specialized tank.

• The program at Monterey Bay involved capturing young sharks and acclimating them in ocean pens before moving them to the aquarium. Despite the success, the initiative faced criticism due to the physical harm sharks experienced and the ethical implications of captivity.

• Efforts to display great whites have ceased due to the high resource demands and ethical concerns. However, these displays have played a role in raising public awareness about marine conservation and the threats faced by oceanic species like the great white shark.