Among them, goldfish is a kind of wide-temperature fish, which has certain adaptability to temperature, while betta, moonfish, swordfish and zebra fish are tropical fish, so they must be raised with heating rods to control the temperature.
1. Goldfish Goldfish is an ornamental fish evolved from crucian carp and one of the three major ornamental fish.
There are many kinds of it, which are usually divided into four lines, namely, grass species, literary species, dragon species and egg species.
Among them, grass is the best goldfish, and it is also a common goldfish, especially in small fish tanks.
Second, fighting fish is divided into fighting fish in Thailand and fighting fish in China. No matter what kind, they are very aggressive and prefer to fight, so they are usually not suitable for polyculture.
This kind of fish is small, about 6-7 cm long, with reddish-brown body and blue-green horizontal belt, which is more suitable for keeping in small fish tanks.
3. Moonlight Fish Moonlight Fish is a small tropical fish with a body length of only 4-6 cm. Strong adaptability, easy to breed, especially with swordfish, can breed new varieties with different appearances.
Because it is not big, it is not bad to keep it in a small fish tank.
4. Swordfish Swordfish is a tropical fish belonging to the family Anthuridae. It has a mild temperament and can be mixed with other small fish.
Adapted to the environment of 20-25℃, it has miscellaneous eating habits and may be denatured during growth.
It is easy to raise and resistant to low temperature. Can be kept in a small fish tank.