How do swim bladders help fish go up and down in water?

The trick is the swim bladder, which is basically like an air-inflated balloon that can expand and contract depending on how much gas is inside. When the swim bladder expands it will increase in volume and therefore displace more water. This increases the fish's buoyancy and it will float upward.

Explanation:

where is the diagram?

if you insert the diagram ill be able to you

a covalent bond, specfically triple bond