When the fish is placed too close and the bait is insufficient, the fish is in a state of semi-starvation for a long time, which makes the fish shriveled and emaciated, with a big head and a small tail, a thin back like a blade and a dull body color. Eventually collapsed and died. Pay attention to giving enough bait and increasing nutrition, and the fish is expected to return to normal growth.

2. The low oxygen content in the water makes the fish don't want to eat because of lack of oxygen.

You can go to the aquatic product store to buy related medicines.