The difference between tropical fish cold water fish and marine fish?

Answer 1

Cold water Freshwater Fish include goldfish and koi. If you are thinking of getting a goldfish they need at least a 20 gallon tank each. They also poop a lot which brings up ammonia levels. On the bright side, cold water fish don't need a heater. =)

Answer 2

To specify the actual differences in scientific medical terminology is way beyond me to do and probably way beyond you to understand if you don't have a degree in Marine Biology and Veterinarary Science. Basically the differences are in the fishes ability to handle different water conditions. In the case of cold water fish, their gills are used to higher density oxygen than the tropical fishes gills so in warmer water the gills are not as efficient and the fish run out of Oxygen. Then there are the the vital organs like the heart, liver, kidneys etc that are designed to operate at specifically lower temperatures than the tropicals whose organs would stop working once the temperature gets too low. So basically Cold water fish would get hypo in tropical conditions and not being able to breath properly they would burn out and Tropicals would go slower and slower in cold water until their organs stop working and they die.

Answer 3

Cold water fish are generally from colder areas of reef/sea as in goldfish (orandas) from Japan. Where as tropical fish are from tropical waters exp Fiji.

Answer 4

Goldfish
Black Moors
Red Cap Fancies
Calico Fancies
Red Fancies
Red and black Fancies

Answer 5

difference in salt and temperature tolerance.