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What are the "Big Three" and the "Big Four" Japanese koi varieties? WWD Fish Notes
After koi were made a viral sensation on Taobao last year, koi, after lying quiet for many years, have slowly returned to the public eye. What we call koi generally refers to Japanese koi with distinct characteristics, also known as KOI, while varieties with color that is not vivid are called "local cannons." In other words,
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Koi Fish Disease Symptoms and a Detailed Guide to Treating White Spot Disease
Koi white spot disease symptoms are caused by a relatively large protozoan ciliate visible to the naked eye -- Ichthyophthirius multifiliis. It parasitizes the skin, fin rays and gill tissue of koi, feeding on the epithelial cells of the koi. In severe cases, the whole body skin and fin rays...
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How to raise koi so they grow fast? Causes of Chilodonella and treatment methods
Chilodonella symptoms: During the fry stage, it mainly damages the skin and fin rays. In adult fish, besides attacking the skin, it also heavily infests the gills, oral mucosa and nostrils. When the fish body and gill filaments are irritated by large numbers of pathogens, it causes excessive mucus secretion, which glues the gill lamellae together...
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Common diseases of koi and treatment methods for koi trichodiniasis
Symptoms of koi trichodiniasis: When infected, the gill filaments secrete excessive mucus, wrapping around each other, causing difficulty in breathing; the fish body turns black, and external mucus increases, as if covered by a layer of white mist. If not treated in time, death will occur soon. It is especially harmful to fish under 20 cm...
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How often should you change the water for koi, and how to treat myxosporidiosis
Symptoms of myxosporidiosis: Generally, cysts of varying sizes form on the body surface, under the skin, on the gills, and in the muscles, causing the fish to turn black, become thin, and swim weakly; when the parasites infest the gills, many white cysts are visible to the naked eye on the gills, which damages the gill tissue and affects the koi's...
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Symptoms and Treatment Methods for Anchor Worm Disease in Koi
Anchor worm disease: The parts where anchor worms burrow into the fish body, scales rupture, skin and muscle tissue become red, swollen and inflamed, tissue necrosis occurs, and saprolegnia fungi invade and grow profusely. After koi are infected, they swim slowly, lose appetite, and then gradually become emaciated. Prevention and treatment methods: (1) Fish...
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What are the common diseases of koi? Detailed treatment methods for fish lice disease
Symptoms of fish lice disease. Fish lice parasitize the body surface and gills of koi, using their mandibles to tear the epidermis and suck the fish's blood, causing many wounds, which facilitates the invasion of other pathogens and triggers other fish diseases; at the same time, when fish lice pierce the fish body, they introduce the toxins they secrete into the fish...
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Causes and Treatment Methods of Koi Carp Gill Rot Disease
Symptoms of gill disease (1) Commonly known as "open skylight", the gill filaments rot and carry mud; in severe cases, the cartilage at the ends of the gill filaments is exposed, the inner epidermis of the operculum is congested, and the central epidermis is often corroded into a round transparent small hole. (2) Gill mold disease caused by fungi: the gills of diseased fish appear pale...
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What to Do When a New Koi Lies on the Bottom of the Tank? Causes and Treatment of White Fungus Disease
White fungus disease, also known as saprolegniasis. This disease generally occurs in low water temperature environments below 20°C, and is most prevalent in early spring and late winter. Water molds have no strict selectivity for hosts, and both fish eggs and adult fish are easily infected. Fish in densely stocked overwintering ponds, fish in lean water bodies in spring...
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Symptoms, causes, and treatment methods of white head and white mouth disease in koi
Causes of white head and white mouth disease in koi. White head and white mouth disease can also be caused by a massive invasion of Trichodina. Symptoms: sick fish move slowly, body color is slightly dark, and the top of the head and area around the mouth turn white. Taking tissue from the affected area to make a slide and examining it under a microscope, you can see clusters of parasitic flower bacteria constantly swinging, or you can see groups of Trichodina moving. The pigment in the skin of the forehead and around the mouth of the sick fish disappears, appearing white.
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