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Dropsy (Pine-Cone Disease)

Dropsy (Pine-Cone Disease)

Raised scales (rather like a pine cone) and eyes standing out from the head.

Dropsy itself is not a disease, but rather a result of some other cause. Dropsy is a term given to the swelling that occurs internally in the fish. There are multiple possible causes. Sometimes it's not contageous, but sick fish should be isolated and treated since determining the actual cause may be impossible, and also because this will be easier on the fish.

The fish's body will become swelled with fluid it is unable to expel. Eventually the swelling will cause the scales to raise, giving the fish what is called the "pine-cone" appearance.

Diagnosis, One of these situations may be the cause:

  • Sudden swelling: A bacterial infection will cause internal bleeding.
  • Slow swelling: Growing tumors, or even parasites, in the fish may cause it to swell.
  • Slow swelling: Mycobacterium tuberculosis. Highly contageous!

Bacterial dropsy is infectious so treat with an anti bacterial remedy and if possible isolate affected Koi.

See More Koi Diseases

Anchor Worm (Lernaea)

Anchor Worm (Lernaea)

Lernaea (also spelled Lernea) is a genus of copepod crustaceans commonly called anchor worms, parasitic on freshwater fishes. They mate during the last free-swimming (copepodid) stage of development. After...(click on product image for more details)
Columnaris (Cotton Wool Disease)

Columnaris (Cotton Wool Disease)

Columnaris (Flexibacter columnaris) or Cotton Wool Disease is another bacterial infection. The common name comes from the white tufts that develop around the mouth and spread to the body and fins, often...(click on product image for more details)
Costia

Costia

Costia is a minute Flagellate with 3-4 flagella. It affects both the skin and gills of Koi, and reproduces itself by binary fission. Infestations of this parasite can appear very rapidly indeed, and Koi...(click on product image for more details)
Ergasilus (gill maggots)

Ergasilus (gill maggots)

Gill maggots are the mature females of the parasitic crustacean Ergasilus. Ergasilus (gill maggots) will appear as grayish black and white parasites several millimeters long infesting the gills.
Fin Rot and Ulcers

Fin Rot and Ulcers

A number of bacteria are associated with fin rot, lesions and internal hemorrhaging, notably Aeromonas and Pseudomonas. Ulcers usually start at the site of an injury, the bacteria then infect it causing...(click on product image for more details)
Fish Lice (Argulas)

Fish Lice (Argulas)

Argulus another crustacean parasite, round and up to 1cm wide. They have a sucker to hold on to the Koi with needle-like mouth parts which they stick into the Koi and inject a toxin. This causes intense...(click on product image for more details)

Product Compatibility Chart

Every pond owner with fish, at some time or another, will probably have to medicate their pond. Though Koi are extremely hardy, it is very important to keep a watch on their environment to keep them at...(click on product image for more details)
Saprolegnia fungus

Saprolegnia fungus

One of the most common fungal infections of Koi. The fungal spores will grow anywhere on the Koi, including the gills, initially germinating on dead tissue. Their threadlike hyphae release digestive juices...(click on product image for more details)
Skin and Gill Flukes

Skin and Gill Flukes

Gill and Skin flukes are two of the family of monogenetic trematode genera, all of which are characterised by the large grappling hooks which are used to attach themselves to their victims. Flukes are...(click on product image for more details)
White Spot (Ich)

White Spot (Ich)

Caused by Ichthyopthirius multifiliis. The white spots on the skin, gills and fins are individual protozoan cells that are under the skin and feed on the body fluids and cells. They then punch out of the...(click on product image for more details)