Freshwater Fish or Saltwater Fish?

Freshwater fish include the tropical and coldwater fish. Saltwater fish are also listed under Marine fish.

Aquarium fish estimate at more than 22,000 species. The species include damsels, goldfish, reedfish, killifish, kingfish, catfish, loach, minnows, blind cavefish, long fin characin, and so on.

Freshwater fish differ from the saltwater fish, in that the saltwater fish require different water conditions, feed, water temperatures, pH levels, and so on.