Why Can T Saltwater Fish Live In Freshwater
Olivia Luz
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Freshwater fish have learned to adapt to these changing conditions.
The reason some fish normally live in freshwater and others live in seawater is that one or the other environment provides them with opportunities that have traditionally contributed to their. Liquids inside freshwater fish are saltier than the water around them so the fish. The reason freshwater fish cannot survive in saltwater and vice versa has a lot to do with a property of any liquid called tonicity. Tonicity comes in three types.
Hypertonic hypotonic and isotonic. Saltwater fish rely on osmosis for survival which determines how much water enters and exits their cells. Saltwater fish drink enormous amounts of water to keep from drying out. Thus saltwater fish have.
In simple words it is the ability of a solution to exert osmotic pressure upon a membrane. Saltwater fish are evolved to deal with water constantly rushing out of their bodies. In fact freshwater fish will often be unable to survive if the salinity levels of their surrounding water reaches more than 05 percent according to the national biological information. Why freshwater fish can t live in salt water and vice versa.
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If the water surrounding a fish contains too much salt water transfers out of the fish. Saltwater fish can t survive in freshwater because their bodies are highly concentrated of salt solution too much for freshwater. Why can t saltwater fish survive in freshwater. Saltwater fish can live in salt water since they have always lived in it and they are able to get it out of their selves.
The hypertonic cells within a saltwater fish absorb water out while keeping salt within. Salt is a desiccant it absorbs water. However most freshwater fish have no ability to adapt to saltwater and by placing them in a marine environment they will quickly dehydrate as they do not have the ability to drink the water as most marine fish do or fish that can.
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