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How do fish hydrate them selfs?

Updated: 11/9/2022
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12y ago

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Most fish that live in the ocean, take in saltwater through their mouths. They then filter out the air (which is how they get oxygen) and blow the water out of their gills. When they need water they start with the same by taking the saltwater into their mouths but, this time they filter out the oxygen AND salt and just keep the clean water. Explaining how they filter this would take to long so this is just the simple answer. I hope it was useful and informant.

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12y ago
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Q: How do fish hydrate them selfs?
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