I'd be cool to have a BFT in an aquarium. But they are endangered - respect their species, they'll go extinct soon... that is if i don't clone them!!! JK... I wish I could.
I honestly have given this thought. Not Bluefin, but Albacore or maybe Yellow Fin...
I am thinking a current pool with the current put on a dimmer that was on a timer. The current could slowly increase and decrease several times a day. You could get one big enough to house a school of albacore comfortably for about $30k.
My worry is when they jump, which bring us back to the airplane on a tread mill question. Would a fish in a current tank land back in the tank when it jumped or would it land on the pool deck. A fence around the pool would force it to land back in the water, but how tall should it be? I have seen BFT jump 18-20 feet.
HA! Cool idea, I think that the tuna would land back in the pool... most of the time. They would jump at the rate of speed the water was set at. MMMMM, tuna steak!