because the bubbles are air the air can't fuse with hydrogen to become water because there is no excess hydrogen so it goes to the air as bubbles
Goldfish make bubbles underwater by releasing air from their gills, which creates bubbles that rise to the surface of the water.
No, you cannot breathe air bubbles underwater because they do not contain enough oxygen to sustain human respiration.
Hot bubbles
You have to swim through an underwater maze. Pop bubbles for oxygen.
Jump and tuck your head and exhale through your nose and just keeping practicing!! 
sometimes they like to go underwater (they can breath under water because the hairs on theirbody make air bubbles)!
This is the easiest way to not hold your nose underwater. When you go underwater, blow bubbles out of your nose. This will prevent the water from entering your nose. Just blow bubbles out of your nose frequently and no water will get up your nose.
The player was unable to exhale after suffering a hit.
lots of bubbles come out and it's a sort of gurgling noise
The bubbles produced by pondweed during photosynthesis underwater contain oxygen gas. This is a byproduct of the process and indicates that photosynthesis is occurring. If the experiment permits the bubbles to escape, they can be collected and tested to confirm the presence of oxygen.
Leaves have gaseous exchange through its stomata or free cell surface (in case of water plants). These gases come out in the form of bubbles in water. Hence air bubbles are formed when leaves are in water.
Because they need it. They can't actually breathe out of water so they need things like filters or the back of boats to make air bubbles