What does it mean when a goldfishes stomac is big and there bottom hole big?

When a goldfish has a big stomach and bottom hole, it usually indicates a few potential health issues:

1. Dropsy: Dropsy is a condition where there is an accumulation of fluid in the body of the goldfish, causing the fish to appear swollen and bloated. This can result in the stomach and bottom hole becoming enlarged. Dropsy can be caused by various factors including bacterial infections, organ failure, and poor water conditions.

2. Constipation: Constipation is another possible cause of a big stomach and bottom hole in goldfish. This condition occurs when the fish has difficulty passing stool due to a blockage in the digestive tract. It can be caused by a variety of factors such as overfeeding, improper diet, or internal parasites.

3. Swim Bladder Disease: Swim bladder disease is a condition that affects the swim bladder of the goldfish, an organ that helps the fish maintain its balance and buoyancy. When the swim bladder is damaged or diseased, it can lead to problems with the fish's ability to swim and maintain its normal body posture. This can cause the fish to appear bloated and have difficulty moving, which may contribute to the appearance of a big stomach and bottom hole.

It's important to note that any significant change in the appearance of a goldfish should be taken seriously, as it could indicate a health issue. If you notice your goldfish has a big stomach and bottom hole, it is recommended to observe the fish closely and monitor its behavior for any other signs of illness. If the condition persists or if the fish shows any other concerning symptoms, it is best to consult with a veterinarian or experienced aquarist who can properly diagnose and treat the fish.