to breathe
a fish stay longer by muslimninja
fish have scales and fish and reptiles can both stay under water
because they are fish
Yes, while he can live under water, he does need to surface to breath.
The water in the fishbowl is evapourated which forms air bubbles under the leaves in the fish tank because the evapourated water escapes the bowl of water by travelling as a bubble. The leaves in the fish tank traps the bubble under it causing it to stay there.
Guppies are surface fish and tend to stay there particularly it there is a problem with their water conditions. (too cool under 65F or water needs changing).
They close their Nostrils (Nose) so they can spend longer time under water so they can catch Seals Or Fish
Eagles don't dive in water. The species that do hunt fish do so at the surface. They might get a dunking, but that's it.
you can not make air stay under water!
They can stay under water for 10 seconds.
oxygen mask
I don't think so due to the fact the fish would have to stay in the water while the surgery was happening and it would be all wet and infected, also the fish would drown if you just held it there under the water.