This disease is considered zoological and can spread to humans. If you think your fish has the following disease, be sure to only treat if there are no open wounds, cuts, sores, etc. present on your body. Those with corrupted immune systems are also at risk!


Yes, this disease is also prevalent in marine life like it is with humans. It acts similarly to how it would for humans, but luckily the fish will show more external signs of despair if it is affected. The fins will become frayed, similar to fin rot. The fish will also lose its appetite with all foods, and there may be ulcers or reddish-purple blotches that develop on the body of the fish. Other signs include the loss of scales, or abnormal bends in the fish’s skeletal structure. The disease is often caused by overcrowding a tank or high amounts of stress. It is not very common to appear in an aquarium, especially in saltwater aquariums (as fish with labyrinth organs are at the highest risk of the disease), but it does happen.


  • Quarantine fish
  • Use bacterial medication
  • Frequent water changes