Tropical Fish Site

Profiles Reviews Guides for Tropical and Marine

Body Flukes Fish Disease

Undesirable environmental conditions can cause body flukes disease in tropical fish. Such conditions include poor water quality, overcrowding, and/or stress by incompatible species, please check the tropical fish profiles of the fish you are keeping to ensure compatibility. All these possible conditions may be the cause of body flukes and what has led to conditions that can lead to destructive outbreaks. Flukes (flatworms approximately 1 mm long) are often present in aquariums but remain harmless under ideal conditions.


  • Scratching against objects by the affected fish
  • Layer of mucus covering gills or body
  • Gills moving rapidly
  • Chewed on or eaten-away gills or fins
  • Reddened skin
  • Note: Pale fish with drooping fins, rapid respiration and/or hollow bellies indicate more extensive infestation


Isolate the fish and treat with Body Fluke treatment such as Sterazin. Always follow guidelines given on the treatment bottle and isolate the fish before treating.


Avoiding stressful conditions is a key to prevention, but once an outbreak occurs, prompt treatment is critical.

Tropical Fish Site takes no responsibility for diagnosing the exact problem with your tropical fish, this is purely meant as a guide only. Be sure to look at other common tropical fish diseases to ensure you have made the correct diagnosis as there is often crossover between them.