These 7 Prettiest Fish for Freshwater Aquariums Will Catch Your Fancy

Black Molly

This is another of the friendlier type of fish. This is one of the perfect choices to have if you plan on caring for multiple species. One of its advantages is that you can put this one in a tank with either fresh or salt water and it will adapt to it easily. A temperature range between 70 and 82 degrees F is perfect for these. They tend to be cannibalistic to the young they bear.