Freshwater Tropical
Saprolegnia (Cotton Mold)
Oomycete disease of aquarium fish. Key signs: cotton-wool-like white or grey patches on skin, fins or eggs, often…
Moderate
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.
Fish type
Symptom
Bloated Abdomen 2
Bloated belly 2
Clamped Fins 3
Cloudy Eye 1
Color Fading 1
Cotton Like Growth 1
Cottony Tufts 2
Darkened color 4
Dropsy 1
Emaciation 4
Erratic Swimming 7
Excess Mucus 3
Eye Discharge 1
Fin Erosion 1
Fin Rot 3
Fin Whitening 1
Flashing 4
Flashing / rubbing 8
Floating 1
Frayed Fins 6
Gasping at surface 4
Gill Damage 1
Gold Dust Coating 1
Gold-dust film 1
Granulomas / nodules 3
Head Pitting 1
Hemorrhage 1
Hemorrhaging 13
Lateral Line Erosion 1
Lethargy 19
Listless near bottom 1
Loss Of Appetite 7
Loss Of Balance 1
Mouth Erosion 1
Open Sores 4
Pale Gills 4
Pinecone Scales 1
Pop Eye 17
Rapid breathing 4
Rapid Gilling 4
Red Fin Bases 1
Red Ulcers 2
Scale Loss 1
Scratching 3
Sinking 1
Skin Erosion 1
Skin lesions 4
Spinal Deformity 2
Sudden death 3
Sunken Eyes 1
Swimming Sideways 1
Tissue necrosis 8
Ulcers 1
Visible parasite 1
Wart-like growths 2
White Fin Edges 1
White Grey Patches 1
White Patches 1
White Patches Gills 1
White Spots 5
White Stringy Feces 1
White Tail 1
Cause
Aeromonas hydrophila 1
Aphanomyces spp. 1
Argulus spp. 1
Bacteria 16
Branchiomyces spp. 1
Columnaris 1
Dactylogyrus spp. 1
Environmental 2
Fungus 3
Ichthyophthirius multifiliis 1
Lernaea spp. 1
microsporidian 1
Parasite 18
Pleistophora hyphessobryconis 1
Pseudoloma neurophilia 1
Pseudomonas fluorescens 1
Saprolegnia spp. 1
Trichodina spp. 1
Virus 14
Marine / Saltwater
Marine Ich (Cryptocaryon irritans)
Parasite (ciliate protozoan) disease of aquarium fish. Key signs: white spots (larger and more diffuse than freshwater ich),…
Moderate
Freshwater Tropical
Ich (White Spot Disease)
Parasite (ciliate protozoan) disease of aquarium fish. Key signs: small pinhead-sized white spots (cysts) on skin and fins;…
Moderate
Goldfish
Asian Tapeworm Infection
Parasite (cestode) disease of aquarium fish. Key signs: heavy intestinal worm burden, emaciation, distended abdomen, anaemia, intestinal blockage;…
Moderate
Freshwater Tropical
Whirling Disease
Parasite (myxosporean) disease of aquarium fish. Key signs: whirling (tail-chasing) behaviour, blackened tail, skeletal deformities (cranial deformations, scoliosis)…
Critical
Freshwater Tropical
Bacterial Cold Water Disease
Bacterium disease of aquarium fish. Key signs: rtfs in fry: spiral swimming, exophthalmia, dark colouration, anaemia, splenomegaly; older…
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
Viral Hemorrhagic Septicemia (VHS)
Virus disease of aquarium fish. Key signs: acute: exophthalmia, anaemic gills, hemorrhages on skin and at fin bases,…
Critical
Freshwater Tropical
Infectious Hematopoietic Necrosis (IHN)
Virus disease of aquarium fish. Key signs: fry: darkened skin, exophthalmia, distended abdomen, faecal cast trailing from vent,…
Critical