Zebrafish has strong resistance to the change of water temperature, and can survive as long as the water temperature is not lower than 20℃, and the optimum growth temperature is 25℃. It can be used as bait or dry feed for various animals. Zebrafish are gentle and swim in groups.

Peacock fish is mild in temperament, can be mixed with moderate small and medium-sized tropical fish, is usually lively and active, and has a short life. Peacock fish is an omnivorous fish with strong adaptability to the environment.

The guppy is very adaptable and lives well in an aquarium without temperature regulation and inflation equipment. It can tolerate the low temperature of 65438 06℃ and dirty water quality, and the optimum growth temperature is 22-24℃, and it likes slightly alkaline water quality.

Extended data

I. Population distribution

1, zebrafish

Rivers in Bangladesh, India, Pakistan, Myanmar and Nepal. It was introduced to the United States, Sri Lanka, the Philippines, Mauritius and other places.

2. peacock fish

Origin: North America, Venezuela, Barbados, Trinidad and Tobago, Guyana and northern Brazil.

Asia, Oceania and the Pacific, Europe, North America and South America.

Second, the morphological characteristics

1, zebrafish

The body is rhombic, about 5 cm long, and the tail is flat. The female fish has a wider body, enlarged abdomen and yellowish buttocks. The male fish has a narrow body, yellow body and olive back. From the back to the tail and gluteal fin, there are several dark blue stripes on the caudal fin, and the whole body stripes are like zebra stripes, hence the name.

The caudal fin is deeply forked. Each fin is yellow and transparent. Due to the number and width of stripes and different fins, different varieties have been formed.

2. peacock fish

The body length of guppy is prolonged, and the body shape and color of male and female fish are quite different. The male fish is thinner, 3-4 cm long, and the female fish is 6 cm. Its tail stalk and tail fin account for more than 1/3 of the whole body, and each fin is shorter than that of the male fish.

The front is slightly wedge-shaped and the back is flat. The abdomen of the female fish is swollen and round. Big head, short kiss. Big eyes, lateral position; The area between the eyes and the back of the kiss is quite straight. Small mouth, oblique crack, inferior; The mouth crack is much smaller than the lower part of the leading edge. There are big round scales on the quilt.