What do goldfish when they become stressed?

* Turn pale or dark in color.

* Develop black or red skin spots.

* Have clamped fins or fins that are held close to the body.

* Rapidly swim or dart around the tank.

* Hide or remain motionless in one spot.

* Lose their appetite or refuse to eat.

* Have difficulty swimming or maintaining balance.

* Produce more slime than usual.

* Develop popeye.

* Excessively yawn or stretch.

If you notice any of these signs of stress in your goldfish, take steps to reduce the stressor and improve the fish's environment.