pregnant goldfish?
When a goldfish becomes egg laden, she becomes slightly enlarged. If she is huge or really fat, she is probably not full of eggs. This section on my site is entitled, “Why is my fish fat?” and lists some possibilities: http://www.fishpondinfo.com/health4.htm#fat Dropsy is the most common reason for a goldfish to become large. If the scales are sticking out, it’s dropsy. If the entire fish slowly gets huge, it may be a kidney malfuction. Goldfish can also have localized cysts and tumors full of fluid, fat, or rarely, cancer. Most of these problems are not really treatable unfortunately. Treatment with pond salt and antibiotics sometimes creates some improvement. The bacteria that cause dropsy and other internal bacterial infections are ubiquitous which means they’re always in the pond. For that reason, there’s usually not a concern about transfer of the problem to other fish. Since you have four that are enla