Comprehensive pathogen, symptom, diagnosis and treatment guides for viral, bacterial, parasitic and fungal fish diseases — used by aquaculturists, veterinarians and hobbyists.
A myxozoan tissue parasite of Pacific salmon muscle causing grossly visible white milky cysts, rende...
A plerocercoid cestode (tapeworm) infection of freshwater fish, in which the large ribbon-like larva...
A poorly understood skin condition of farmed Atlantic salmon characterised by irregular red marks on...
Toxic accumulation of unionised ammonia (NH₃) in fish water causing gill damage, neurological dysfun...
A severe parasitic gill disease of sea-water Atlantic salmon caused by the marine amoeba Neoparamoeb...
A necrotising oomycete disease of freshwater and estuarine fish caused by Aphanomyces invadans, prod...
A chronic systemic bacterial disease of salmonids caused by Renibacterium salmoninarum, primarily af...
A lethal myxozoan gut disease of Pacific salmonids in the Columbia River basin caused by Ceratomyxa...
A highly lethal herpesviral disease of juvenile channel catfish caused by Ictalurid herpesvirus 1, c...
A parasitic ciliate infection of the skin and gills of freshwater fish caused by Chilodonella spp.,...
Toxic accumulation of dissolved copper ions in water, causing gill damage, mucus hyperproduction, ne...
A haemoflagellate blood parasite disease of Pacific salmonids caused by Cryptobia salmositica, trans...
A herpesviral disease of goldfish and crucian carp causing severe haematopoietic necrosis, gill dama...
The most economically important disease of the US channel catfish aquaculture industry, causing ente...
A severe iridoviral disease endemic to Australia, causing massive necrosis of haematopoietic tissues...
A systemic fungal infection of fish caused by black yeast-like fungi of the genus Exophiala, causing...
Rainbow Trout Fry Syndrome (RTFS) and Bacterial Cold Water Disease (BCWD) in salmon — two manifestat...
A systemic bacterial disease of salmonids caused by Aeromonas salmonicida, characterised by boil-lik...
Emboli (bubbles) forming in fish tissue and blood when dissolved gas supersaturation (>110% total di...
A monogenean ectoparasite devastating to naive Atlantic Salmon populations, causing hyperinfection a...
A protozoan ectoparasite infection caused by the flagellate Ichthyobodo necator, attaching to skin a...
The most common and devastating freshwater fish disease globally — caused by the holotrophic ciliate...
A rhabdoviral disease causing haematopoietic (blood-forming tissue) necrosis in salmonids, particula...
A severe viral disease of Atlantic Salmon caused by ISAV, characterised by high mortality in sea-wat...
A highly contagious and lethal herpesviral disease of koi and common carp, causing mass mortality at...
A gram-positive bacterial septicaemia of fish caused by Lactococcus garvieae, causing haemorrhagic s...
A nutritional disorder in salmonid offspring caused by maternal thiamine (Vitamin B1) deficiency, re...
A chronic granulomatous disease of fish caused by acid-fast mycobacteria, forming granulomas through...
Poisoning by elevated nitrite in water, which enters fish gills and oxidises haemoglobin to methaemo...
A dinoflagellate ectoparasitic disease causing a characteristic golden-yellow "velvet" or "rust" dus...
Mass mortality or sublethal physiological stress in fish caused by insufficient dissolved oxygen in...
An acute or subacute bacterial septicaemia of marine fish caused by Photobacterium damselae subsp. p...
Physiological damage or death in fish caused by exposure to acidic water (low pH), impairing ion reg...
A salmonellosis-like rickettsial disease of salmonids caused by the obligate intracellular bacterium...
A severe iridoviral disease of marine fish caused by Red Sea Bream Iridovirus, a Megalocytivirus cha...
A water mould (oomycete) infection producing characteristic white-grey cotton-wool tufts on the skin...
A rhabdoviral haemorrhagic disease of cyprinids occurring primarily in spring when water temperature...
An emerging viral disease of tilapia causing syncytial encephalitis and high mortality, spreading ra...
A mysterious ulcerative skin disease of adult returning Atlantic Salmon in UK and Irish rivers, prod...
A haemorrhagic septicaemia of marine and estuarine fish caused by Vibrio anguillarum, producing exte...
A rhabdoviral haemorrhagic disease of great epidemiological importance affecting a wide range of mar...
A nodaviral disease causing vacuolating encephalopathy and retinopathy (VER) in larval and juvenile...
A severe myxozoan parasitic disease of salmonid fry caused by Myxobolus cerebralis, which invades ca...
A motile Aeromonas septicaemia (MAS) caused by Aeromonas hydrophila, an opportunistic pathogen that...
A oomycete infection causing necrosis and rotting of gill tissue, associated with warm, oxygen-deple...
A chronic cardiomyopathy of large sea-water farmed Atlantic salmon caused by PMCV, characterised by...
A gram-negative bacterial disease causing cotton-wool-like yellow lesions on the skin, gills, and fi...
A systemic Yersinia infection of salmonids characterised by reddening of the mouth, jaw, and opercul...
A seasonal ulcerative disease of fish caused by the oomycete Aphanomyces invadans, producing deep, i...
An emerging granulomatous disease of fish caused by the intracellular bacterium Francisella, forming...
A birnaviral disease of salmonids causing necrosis of pancreatic acinar tissue and severe enteritis...
A chronic granulomatous disease of marine fish caused by the filamentous bacterium Nocardia seriolae...
A myxozoan kidney disease of salmonids causing massive proliferation of lymphocytes and monocytes in...
An alphaviral disease of farmed Atlantic salmon characterised by pancreatic necrosis, cardiomyopathy...
The principal ectoparasite of farmed Atlantic salmon in the North Atlantic, causing skin lesions and...
A systemic bacterial infection of fish caused by Streptococcus and related gram-positive cocci, caus...
A marine bacterial disease causing extensive superficial ulcerative lesions on the skin, fins, and m...
Physiological dysfunction and mortality caused by water temperatures exceeding (or falling below) th...
A parasitic copepod whose females anchor into the muscle of fish using forked head appendages, causi...
A branchiuran crustacean ectoparasite that attaches to the skin of freshwater fish, causing puncture...
A bacterial gill disease of salmonids caused by Flavobacterium branchiophilum, characterised by lame...
A nematode intestinal parasitic infection of freshwater fish caused by Camallanus species, with worm...
A poxviral disease of koi and common carp characterised by lethargy, oedema of gills and skin, and t...
Monogenean trematodes that parasitise the gills of freshwater fish, causing irritation, mucus hyperp...
A digenean trematode whose metacercaria accumulate in the lens of fish eyes, causing cataracts and b...
A bacterial disease caused by Edwardsiella tarda causing internal abscesses, gas-filled lesions, and...
A ciliate ectoparasitic infection of fish skin and fins caused by stalked peritrich protozoans of th...
A parasitic copepod infection of fish gills caused by female Ergasilus copepods, which attach perman...
A reoviral disease of farmed Atlantic salmon causing inflammation of the heart and red skeletal musc...
A chronic parasitic condition of cichlids and other tropical freshwater fish caused by flagellate pr...
A systemic infection caused by the mesomycetozoean Ichthyophonus, forming granulomatous cysts throug...
A myxozoan parasite that invades the muscle of marine fish, releasing enzymes post-mortem that cause...
Deposition of calcium carbonate and calcium phosphate crystals in the kidney tubules of fish exposed...
Opacification of the lens of the eye in farmed salmonids, primarily caused by dietary deficiency (es...
An opportunistic bacterial septicaemia caused by Pseudomonas species, typically striking immunocompr...
A togaviral disease of freshwater rainbow trout characterised by fish lying on their sides at the po...
Saucer-shaped ectoparasitic ciliates that rasp the skin and gills of fish, causing irritation, mucus...
A zoonotic nematode larva found coiled in the muscle and viscera of marine fish; causes anisakiasis...
Progressive necrosis and erosion of the fin margins caused by a mixed bacterial infection, typically...
An iridoviral disease characterised by dramatic hypertrophy of individual infected cells (fibroblast...