In aquatic feed, fish meal has always been a popular source of protein because it contains rich protein and fatty acids, has a balanced amino acid composition, is easy to digest and has good palatability. However, overfishing of wild fish for fish meal production has brought great pressure to the ecological environment. At the same time, the continuous rise in fish meal prices has also squeezed the profit margins of aquaculture and even triggered competition for resources between aquaculture and human consumption. Therefore, finding a nutritious and sustainable fish meal substitute has become an urgent problem to be solved in the field of aquaculture.