Fish can also get bacterial infections. This is brought on by fighting among the fish in the tank, biting and nipping. The fins appear ragged and split and may be streaked with blood. Other bacterial infections also brought on by fighting include skin ulcers. Also, prompt treatment of this with fish medication can take care of the problem.
Fish are also subject to viral infections which tend to be on the serious side.
This appears in the fish as hemorrhaging around the gills or head and usually coincides with abdominal swelling. Unfortunately there is no treatment for such viral infections. Learn how you can diagnose and how you can treat it rapidly before it spreads. There are also techniques that you can do to prevent illness in your fish tank. Inc. PageWise makes no representations about the content published on this site.