I'm not entirely sure would be most suitable for these fish. All I was able to find online so far is "NO YOU CAN'T KEEP IT IN A 50 GALLON YOU NEED A BIG TANK." Lol, so there's that. I was thinking they might do well in a 800 gallon? Wonder if the could live in a 4x4x3 though, but that does seem a bit small. I just don't know what type of tank it would be capable of surviving (somewhat well) in.