Would a saltwater fish die if pu..

Brief：
if yes, why? why cant it survive on freshwater? why is it so important for it to necessarily be in saltwater?Answers: Yes it will die. Their bodies ha.. 

if yes, why? why can't it survive on freshwater? why is it so important for it to necessarily be in saltwater?

Yes it will die. Their bodies have certain amount of salt and electrolytes inside. That level is essential to their lives, this is how they normally live. These element will penetrate the fish's skin and get dissolved in fresh water, causing the level of salts and electrolyte in fish's cells to drop below life-sustaining levels. Yes they would. Salt water is not just made up of Salt, but other elements besides the salt that those fish need to survive.

It's the same reasons why most Freshwater fish do not survive in Salt water. The only exceptions to this are fish in the wild (Like Salmon) who come from both waters, or fish that are near both waters (like up in Washinton state). yes, it will die. because it needs to be in saltwater. because that is how it lives.. why don't you just get a freshwater fish!? YES & NO.Most of them eventually will die.freshwater fish will die a lot quicker in saltwater.if you want to treat the fish as a treatment, put in wrong water for a minute; what ever the disease will die before the fish. This fish may be saved. A fish called Mono and Guppy, they can stay in both water but it takes time to do that.you can slowly add saltwater or fresh water into the tank, weeks later, they will be fine.then you can take them to whatever water you want. aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.