Paddlefish introduction?

Polyodon spathala is a species of oyster-shaped, paddlefish, and is a valuable large freshwater fish species in North America. The distinctive feature is that the kiss is a flat paddle and is particularly long. Paddlefish is delicious in meat, and it is rich in collagen. It is rich in nutrition and is a feast. Caviar is expensive and fish skin can be made of high quality leather. Paddlefish can also be sold as ornamental fish. The United States began artificial breeding in the 1960s, and China introduced it from the United States in 1988. It has now successfully cultivated artificially and started to promote production.

Polyodon spathula is also known as spoonbill cat. Raw fish produced in North America is a species of paddlefish. It is a rare large-scale freshwater economic fish in North America. The paddlefish is delicious in meat, and it is rich in collagen and rich in nutrients. It is a feast. Fish mash is expensive in the international market. Fish skin can be made into high quality leather. China currently has about 200 yuan per kilogram of finished fish. Paddlefish can also be sold as ornamental fish, with a body length of 15 centimeters and 30 yuan per tail. The United States began artificial breeding in the 1960s, and China introduced it from the United States in 1988. It has now successfully cultivated artificially and started to promote production.

The distinctive feature of paddlefish is the flattened paddle, which is particularly long. The fish's body surface is smooth without scales, and its back is dark blue-gray, with some spots in between. It has a slightly flaky body side and a white belly. The life span of paddlefish is more than 30 years old and the individual is large. The largest one has been found to be 65 kg. Sexual maturity is more than 8 years. It is suitable for a wide range of temperatures and can live under icy water, and it can survive at a water temperature of 32°C. The demand for dissolved oxygen is higher, above 5-7 mg/l. It is similar to eel feeding and feeding on zooplankton. Artificial breeding can help feed some compound feeds. The growth rate is faster than that of normal freshwater fish. It can grow to more than 0.5 kg in the year, more than 1.5 kg for the 2nd age fish, and 2.5 kg for the 3rd age fish.