I can give you two facts. One is that they have evolved to live in very clean sea water, and will die if they are not in very pure water and another fact is that the parent who actually carries the young inside a pouch on its tummy is the male.
Some fish live in salt water because they just do. Some fish live in water because they were put in water. If you get a fish at home you can put it in salt or water. It also depends on there skin...
There are thousands and thousands of fish. You would definitely need to be more specific. If you are looking for fish of a certain region, there are many websites which name and describe local sea...
The salt level in a salt based CHLORINATED swimming pool is about a tenth of the ocean average, so in terms of salinity I do not think the little guys will survive. On the other hand, I did enhanced...
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