Fish Diseases

Cloudy eyes are a common symptom in aquarium fish and can be caused by injury, poor water quality, bacterial infections, or parasites. Learn how to diagnose the cause, what treatments may help, and when cloudy eyes are a sign of a more serious health problem.

Lymphocystis is a viral disease that causes distinctive cauliflower-like growths on aquarium fish. Learn how to identify the condition, distinguish it from Ich and fungal infections, and understand why many affected fish can recover with proper care and husbandry.

True fungal infections are less common than many aquarium hobbyists believe, but they can still occur when fish are injured, stressed, or weakened. Learn how to identify fungal infections, distinguish them from Columnaris, and explore effective treatment and prevention strategies.

Fish Tuberculosis is a chronic bacterial disease that can cause weight loss, spinal deformities, wasting, and unexplained deaths in aquarium fish. Learn how to recognize the warning signs, understand the risks, and explore prevention strategies for one of the hobby's most challenging diseases.

Hole-in-the-Head Disease is a common condition affecting many cichlids, particularly Oscars, Discus, and Severums. Learn how to recognize the early warning signs, understand potential causes, and explore treatment and prevention strategies before lesions become severe.

Dropsy is one of the most recognizable conditions in aquarium fish, but it's actually a symptom rather than a disease itself. Learn what causes dropsy, how to identify the warning signs, and what steps you can take when a fish begins showing symptoms.