Disease library

Fish disease library

Every disease, parasite, and infection in our knowledge base. Tap the keywords to narrow the list — the page updates with a clean, shareable URL.

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Goldfish

Bacterial Diseases in Koi & Goldfish

Bacterial diseases are among the most common and serious health challenges facing koi and goldfish keepers worldwide. Caused…

Moderate To To To Severe

Freshwater Tropical

Columnaris

A highly contagious bacterial infection (Flavobacterium columnare) presenting as white/grey patches, often on the mouth, fins, or gills.…

Severe

Freshwater Tropical

Cloudy Eye

Hazy or opaque film over one or both eyes — usually a sign of bacterial infection or chronic…

Moderate

Freshwater Tropical

Infectious Pancreatic Necrosis (IPN)

Virus disease of aquarium fish. Key signs: fry: dark color, exophthalmia, abdominal distension, spiral swimming, white mucoid faecal…

Critical

Freshwater Tropical

Tilapia Lake Virus (TiLV) Disease

Virus disease of aquarium fish. Key signs: skin congestion, scale erosion, exophthalmia, abdominal swelling, ocular alterations, behavioural changes;…

Critical