because water is how they breath and air is how we breath. we cannot breath in water so they cannot breath in air.
the bubble is to help it breathe
A neon tetra breaths the same way as any other fish with gills
like every fish through there gills
yes, fish can breathe. they do this by using their gills.
Most fish breathe with gills.
fish breathe through their gills
needle fish will certainly not work well with neon's, they will murder the neon's
Most fish breathe through their gills, not moist skin! :)
Fish breathe with the help with gills.
Yes, fish do 'breathe' through gills.
Jawless fish breathe from gills.
Yes, just make sure it is not too overcrowded. If it is too overcrowded, most fish won't be able to breathe and will die.