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

User Abbood
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2 Answers

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What he said lol I don’t know but I was going to say something like him so I guess I was somewhat right
User Mjsa
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Answer:

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.

Step-by-step explanation:

User Tim Shadel
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