1, breeding germs: golden clams will eat fish feces, debris and other waste, these substances provide breeding conditions for germs. Excessive golden clams will make the water quality of the fish tank worse and increase the chance of germs breeding, posing a threat to the health of the fish.

2, damage to the ecological environment: the reproduction rate of golden clams is fast, easy to overpopulate the fish tank, thus destroying the original ecological environment, affecting the survival of other organisms in the fish tank.