Category: Bacterial fish diseases

Swim Bladder Disease

Rather than a single disease, the name refers to issues which affect your fish’s swim bladder. It can strike the majority of species (most common in Goldfish and Betta). Your fish’s swim bladder won’t...

Viral Infections (Lymphocystis)

This common viral infection affects fresh and saltwater fish’s skin and fins. Not serious, per say, as it rarely ends in death; it only disfigures fish. Physical Signs Growths on the skin or fins (look similar to cauliflowers) Behavioral...

Popeye (exophthalmia)

Also known as exophthalmia, it’s caused by a hemorrhage produced by gas in the capillaries of the eye socket, affecting one or both eyes. Your fish’s eye(s) will start to protrude from its head,...

Columnaris (Mouth Fungus)

Frequently mistaken for a fungal infection (Cotton Fin) due to its mold-like lesions, this is a common bacterial infection in aquarium fish. It’s highly contagious and the outcome is often fatal. Physical Signs Frayed and ragged...

Bacterial Fin Rot

Fin Rot starts at the edge of your fish’s fins, destroying more and more tissue until it reaches the base. At this point, your fish will never be able to regenerate the lost tissue,...