4. Crucian carp: The appearance of crucian carp is similar to that of silver carp, with a flat head. This kind of fish lives in lakes or rivers and near ponds, and most of them feed on phytoplankton in the middle and upper layers of water. Eating this kind of fish often helps to improve memory and has high nutritional value.

3, silver carp: Silver carp is a kind of fish that we often see and eat in our lives. Silver carp is better to breed and live in lakes or ponds, and it is generally artificially raised and grows rapidly.

2. Grass carp: Grass carp is a kind of freshwater fish that lives in lakes or rivers. It feeds on phytoplankton and earthworms, and it is lively and grows rapidly. When it is artificially raised, it will also be fed.

1, herring: herring is a kind of fish with a little blue color, which mainly lives in the Yangtze River and lakes. This kind of fish mainly feeds on phytoplankton in water, and it grows rapidly and has many scales on its body.