Ever since we brought home my blue grey double tail goldfish, she has had issues. She is in the back of this photo behind the orange goldfish and gold/silver koi . She ballooned abnormally and was unable to keep level in the tank. She stopped eating and got fatter. Yesterday, she just looked bad and finally she just ceased to function. She was not wasted, but given to my chickens as a tasty winter snack. The ground was too frozen to put her under the ground. Meanwhile, the rest of the school is doing very well in the tank.