Carp aphid
Carp aphid Carp louse is a small crustacean-like animal that nests on the skin of carp-like fish, such as koi, as well as goldfish. The animal is detectable with the naked eye. Fish that are infected develop red spots. They also start behaving differently, such as rubbing on rocks and jumping above the water. Carp […]
Abdominal dropsy
Abdominal dropsy Abdominal dropsy in koi, goldfish or other pond fish can be recognized by the bloated belly. In addition, the fish’s scales protrude, the fish develops balance problems and the eyes may bulge. The disease is caused by a bacterial infection, a tumor or kidney failure. Poor water quality can be a cause. Treating […]
Koi diseases
Koi diseases Koi diseases are common, especially when the water composition or water quality is not good. When koi are infected, it is important to look closely at the symptoms and determine what condition the fish have. A sick koi can be recognized by lethargic behavior or spots on the skin; other symptoms include scouring […]
Fin rot
Fin rot Fin rot in pond fish is a condition that damages the fins of the fish. It is easily recognized by frayed fins. In addition, the skin may become dull and bloody spots may appear near the tail. It occurs due to a weak condition of the fish that allows the bacteria Pseudomonas or […]
Fish diseases
Fish diseases Fish diseases are usually caused by bacteria, viruses, parasites or worms. When fish are infected, it is important to look carefully at the symptoms and determine what condition the fish have. A sick fish can be recognized by lethargic behavior or spots on the skin. Other symptoms of fish diseases may include scouring […]
Koi pox
Koi pox Koi pox or koi carp pox is caused by a virus present in the pond. It can be recognized by gray cloudy skin spots that look like kerosene drops on the koi. Further spread can be recognized by wart-like and irregular skin tumors that are grayish-white. In adult fish, these conditions will usually […]
Cryptobia
Cryptobia The condition Cryptobia (or black stripe disease) is not very common in pond fish. This parasite is actually more common in tropical fish. If a pond fish does have the Cryptobia parasite, it is usually in the bloodstream of the fish. The condition can be recognized by the fish’s labored breathing, emaciation, lethargy and […]
TB
Fish TB Fish TB, also called fish tuberculosis, is an umbrella term for mostly chronic bacterial infections, which can be caused by various bacteria. Fish tuberculosis weakens the fish, after which other pathogens usually cause the death of the fish. Fish infected with fish tuberculosis can be recognized by bulging eyes and a sunken belly. […]
Oodinium
Oodinium Oodinium is a condition similar to white spot. In fact, white spots also appear on the skin of the fish. Unlike the white spot parasite (ichthyophthirius parasite), Oodinium is caused by the Oodinium pillularis parasite, which is much smaller than the white spot parasite. Due to the fine dots on the fish, which looks […]
Chilodonella
Chilodonella Chilodonella is an oval ciliate found mainly on the gills of the fish and at a later stage on the skin. It is a protozoa, these are divided into three categories: Celiates, Flagellates and Sporoza. The disease causes skin cloudiness and the unicellular organisms are between 100 – 150 μm in size. Just compare, […]
Protozoa
Protozoa or protozoa Protozoa is a collective name for single-celled parasites that cause various diseases in fish and it is easily recognized by the fine dots on the skin. All protozoa need water to move around moreover this can even be a very thin layer around bottom particles. Protozoa are divided into four categories according […]
Skinworm
Skinworm Skin flukes or Gyrodactylus are viviparous parasites that mainly nest in the skin of fish. The skin worm grows about 0.3 to 0.5 mm in size. Compare that to a human hair, which is cirac 0.05 mm thick. In appearance, the Gyrodactylus resembles the gill worm. Therefore, they are close relatives of each other. […]
