can be raised in a fish tank 40 cm

long and 25 cm wide? A fish tank 40 cm long and 25 cm wide can raise 15 small fish below 5 cm, 5 fish of 5-10 cm, and two fish of 10-20 cm at most. As for large and medium-sized fish, it is basically impossible to raise them. Fish in a fish tank should not only be filled, but also be able to swim. If you can't move in the tank, you will die soon. So it's better not to try to raise too big fish, just small fish.

2. What kind of fish

can be raised in this kind of fish tank? 1. Goldfish: Goldfish is an ornamental fish bred from crucian carp. It has a long history in China, and there are many varieties. The five common varieties are grass gold, red dragon's eye, crane top red, bubble and black longevity. Their bodies are not big. It is more than enough to be kept in a tank of 40 centimeters.

2. Guppy: Guppy, also known as anchovy, is a common small tropical fish with a body length of only 3-4 centimeters, so it is no problem to keep it in a 40-centimeter tank. Its feeding habits are mixed, its adaptability to the environment is strong, it is distributed in tropical rivers, and it is suitable for polyculture.

3. Zebrafish: Zebrafish is native to Southeast Asia. It is a lively fish with a body length of about 5 cm. It is very suitable to be raised in a small fish tank. Its body surface has stripes, looks like a zebra, and its fins are mostly yellow and transparent, which is suitable for survival in the environment of 25 degrees Celsius.