Hmmmm ....
How many gallons to keep a Great White?
realistically - an ocean.
To keep a Great White in captivity, for it's entire life. If I had to guess - I would say.
- a staff of dozens of Marine Biologists(to keep track of the shark 24/7) - specializing in Shark Behavior & Biology.
- endless supply of Salmon, Mackeral, Tuna, & Seal or Sea Lion meat.
- A natural seawater tank the size of good size bay(at least 6 billion gallons) - for record that's about 1000 times the size of the Atlanta Aquarium.
Anything least - likely won't be enough.