I assumed as much. So bro would have to have a pressurised chamber that's also dark, so even if it was see-through, there'd really be no use.

Maintaining the tank would also be a bitch probably. Feeding, cleaning, etc. Feeding not so much but...

Anyway, doesn't seem like the optimal solution as a pet or design choice, unless you're like a billionaire, in which case you can do whatever the fuck you want (until we find another Luigi)