The feed production device includes a first water tank in which bacteria and plankton are raised, and a second water tank in which the bacteria and plankton that are raised in the first water tank are annihilated to create a feed for leptocephalus.

Provided is a micro-polluted water body ecological treatment method based on aquatic forest system construction. The method comprises the following steps: (1) investigating a pollution source of a micro-polluted water body; (2) estimating an annual pollution load of the micro-polluted water body which needs to be reduced; (3) designing aquatic animals and plants; and (4) constructing the aquatic animals and plants. By using a water body treated by means of the method in the present invention, an aquatic forest can be formed, and the synergistic effect, nutritional relationship, food chain relationship, etc., between organisms can be fully utilized for effective operation, such that not only can the combined benefits of water quality purification and water body resource utilization be achieved, but the organic unity of environmental protection, economic development, and the improvement of people's livelihood can also be realized.

Provided is a micro-polluted water body ecological treatment method based on aquatic forest system construction. The method comprises the following steps: (1) investigating a pollution source of a micro-polluted water body; (2) estimating an annual pollution load of the micro-polluted water body which needs to be reduced; (3) designing aquatic animals and plants; and (4) constructing the aquatic animals and plants. By using a water body treated by means of the method in the present invention, an aquatic forest can be formed, and the synergistic effect, nutritional relationship, food chain relationship, etc., between organisms can be fully utilized for effective operation, such that not only can the combined benefits of water quality purification and water body resource utilization be achieved, but the organic unity of environmental protection, economic development, and the improvement of people's livelihood can also be realized.