Saltwater Fish require salt water, and fresh water fish need fresh water, you can't mix them, or the fish will die. You need to look at each individual fishes needs as to what temp they need their water to be. There are some saltwater fish that can survive in fresh water, but it is not healthy for them.
No. Tropical Fish required warmer water.
No! because tropical fish live in heated water and koi in cold water.
It is not recommended. Goldfish are cold water fish while tropical fish are warm water fish. Also, goldfish need to be fed more often than most tropical fish and they produce elevated amounts of waste which can be detrimental to fish not accustomed to it.
Most tropical fish live in the ocean, but some do live in freshwater.
no
Those are salt-water tropical fish not the freshwater fish you see in pet-stores.
Clown fish are tropical marine species, they do not live in cold water.
they can be dripped into brackish water tanks
Goldfish may be kept in an uheated fresh-water aquarium. They are considered ill-suited to live in a heated tropical fish tank, as they are used to the greater amount of oxygen in unheated tanks.
tropical fish have to live around 75 degrees
the part where water is
None, goldfish are cold water fish, so having a tropical fish as a tank-mate just wouldn't work because tropical fish need to live in warm water.