No

It is good to have a high lung capacity because you can hold your breath for longer if you are in water of out plus it is alot easier to breath.

What they need in smaller fishbowls is a Oxy shell

I would say yes because I used to be way overweight and it it was harder to breath then. When I started losing weight, it became easier to breath.

No, the air is thinner and can cause many to have to pause and catch their breath. This is because it has an elevation of 14,115 feet.