There are many kinds of fishes in this world. Research has found that more than 25,000 types of fishes are available in this world. Mostly they are classified into two types. Fresh water fishes and salt water fishes. Tropical fish, cold water fish, marine fish to name a few.
Tropical fish needs a warm climate to live in. The temperature should be minimum and it should be able to breathe in the warmth of the water. Though you should avoid direct sunlight on the fish tank, still tropical fishes thrive only in warm climate.
Coldwater fish can live in cold water and cold climate as well. Marine fish lives only in salt water and can live only in the sea. You cannot have a marine fish as a pet.
Fresh water fish is the most favored pet amongst the fishes. These fishes are found in ponds, rivers and inlet streams. They are in myriad colors and very beautiful in appearance. They can be used for ornamental purposes. Hence fresh water fishes are popular and easily available in the market. Since their maintenance expenses are nil it is easy to have fresh water fishes like Goldfish as a pet at home.
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