Title is self explanatory. Do freshwater fish ever accidentally find themselves in brackish or saltwater? How do they deal with that?
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No, freshwater fish and saltwater fish cannot live in the same kinds of water. Their bodies are designed to carefully manage the amount of water and salt in them (just like ours are). If they entered water that was too salty – or not salty enough – for them, and they couldn’t swim out, they would die.
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