Aquarium disease directory.

Marine velvet is the deadliest common saltwater fish disease. Caused by the dinoflagellate parasite Amyloodinium ocellat...

Flukes are flatworm parasites that attach to fish gills (gill flukes) or body surface (skin/body flukes). Common on wild...

Fin rot is a bacterial infection that attacks fin edges, producing ragged, frayed, or receding fins. Almost always cause...

AEFW are species-specific flatworms that eat Acropora tissue. They blend with the coral perfectly when not moving. Sympt...

Red bugs are tiny crustacean parasites (1mm) that infest Acropora colonies. Visible as small yellow-orange specks on the...

Columnaris is a deadly bacterial infection that hits stressed freshwater fish. Often called "cotton wool disease" due to...

The most common parasitic disease. Marine + freshwater treatment protocols including copper, hyposalinity, heat + salt, and tank-transfer methods.

Lethal protozoan parasite that primarily infects clownfish. Formalin treatment in QT.

Fish floating sideways or sinking. Constipation-related cases respond to fast + pea diet; bacterial cases need antibiotics.

Pinecone scale + swollen abdomen. Advanced bacterial / kidney failure. Kanaplex + Metroplex protocol.

Bulging eye(s). Unilateral = injury, bilateral = systemic. Furan-2 + Kanaplex treatment.

Misnamed - it's bacterial Flexibacter columnaris. Highly contagious + can kill the tank in 24-72 hours.

Red wormy strings hanging from fish anus. Common in livebearers. Levamisole HCl protocol.

Visible worm-like protrusion. Pond-fish parasite. Manual removal + Dimilin tank treatment.

Disc-shaped crustacean parasites visible on fish. Pond-fish common. Manual removal + Dimilin treatment.

No effective treatment. Affects neons, cardinals, and other small tetras. Quarantine + euthanasia protocol.

Pitting around tang + angelfish heads. Vitamin deficiency / chronic stress / activated carbon link.

Vibrio, Aeromonas, Pseudomonas. Ulcers, fin rot, mouth rot. Kanaplex + Furan-2 protocol.