Cold-water fish have higher requirements for protein content in feed. Animal protein feed should account for about 60% of the diet, its protein content should be 40-50%, and its fat content should be about 8%. It also needs other nutrients. At present, there are a lot of feed for cold water culture in the market, but the price is not unreasonable, the consumption is large and the feed input is high.

Parrotfish, also known as parrotfish and parrot fish, is a genus of Leptospiraceae, commonly known as parrot fish, parrotfish and red wedge snapper. Is a tropical fish that lives in coral reefs. It is named for its bright colors and parrot-like mouth shape. Another kind of freshwater ornamental fish, also known as the blood parrot, is a hybrid between the male red devil fish of the American cichlid and the purple crater.