Koi Diseases Articles

Chilodonella (ciliates)

Chilodonella (ciliates) are unicellular ectoparasites, i.e. parasites that live on the surface of their host's body. Chilodonella can be easily identified under the microscope by its oval, flat shape and gyrating swimming movements. Chilodonella is about 40 to 70...

Koi Parasite Infestation

Parasites are organisms that live temporarily or permanently on or in another living being (host), feed on it or attack it for reproductive purposes. The parasites can be roughly divided into two groups: tiny single-celled organisms and larger multicellular organisms....

Dropsy in Koi

If you look at the fish from above, does it look like a pine cone (scales are open)? Or is just his stomach a bit thicker? In the latter case, it can also just be a female that comes into laying. Dropsy can be due to a virus or bacteria, and then they are contagious,...

Fin Rot in Koi Carp

Some bacteria, especially Aeromonas and Pseudomonas, cause fin rot, skin disorders, and internal bleeding. These bacteria are common in freshwater and can cause diseases even at a temperature of 10 ° C, with the result that they can be a problem, especially in spring...