Goldfish Dropsy is not highly contagious but is one of the most fatal of the common goldfish illnesses. It is also commonly known as Goldfish Kidney Bloat or less commonly pinecone disease or aeromonas.
Symptoms: Belly appears bloated and continues to worsen. Eventually the scales stick out straight at sides.
This disease causes the belly to swell due to a build up of ascitic type fluid. As it becomes excessive the scales begin to stick out at the sides of the belly like a pinecone. It is thought to be caused by organ failure or poor water quality.
Treatment: Many experts believe dropsy is not treatable. Others believe the fish should be isolated and treated with an antibiotic or salt bath. The tank it was removed from should undergo a cleaning and water change.