The dragonfish is not dead when it is lying on the bottom of the tank.

There are five general reasons:

1, changes in the external environment, that is, frightened.

2, seasonal changes.

3, the internal environment changes, such as new aquascape or new fish are possible.

4, disease.

5, water quality. The first three can generally see the lobster slowly on the good. If the latter two, disease, you need to observe the state of the dragonfish, such as feeding or changes in the body surface; water quality may be your water quality aging, or pH turbulence, water temperature differences in water quality, etc., this situation can only be to regulate the water quality, the dragonfish will be able to slowly good.