Not furry, but we like them anyway.
Ghost Koi
Cyprinus carpio
Also called Ghost carp, Ogon x carp hybrid
From United Kingdom, 1980s. A cross between wild carp and metallic Ogon koi.1
A friendly guide, not veterinary advice. For anything about your pet's health, ask your vet.
At a glance the quick version
Looks how to spot one
Metallic-scaled carp hybrid
Has the sturdy outline of a wild carp but with shining metallic scales inherited from its Ogon koi parent, often giving it a pale, shimmering, ghostly look in the water.12
Personality what they are like
Peaceful and sociable like other koi and carp, and can learn to recognise the person who feeds it.12
Daily activity how busy a day looks
An active pond fish that likes to forage along the bottom and cruise in open water, so it needs space to roam.21
Grooming and care the hands-on bits
Care is the same as for koi: a large pond with a pump and filter, water ideally around 15 to 25 C, and no feeding when the water drops below about 10 C.1
Home where they are happiest
A garden pond at least 1 m deep, or about 1.5 m where winters are harsh. Too large for indoor aquariums.1
Food basics what goes in the bowl
An omnivore. Carp naturally sift the bottom for insects, worms, crustaceans and plant matter; in a pond a quality koi pellet suits it.21
Company who they like around
A schooling fish that prefers company; carp are happiest in groups of five or more.2
The story where it all began
Ghost koi were developed in the 1980s by crossing wild carp with Ogon koi, and they quickly became very popular with British pond keepers. Their metallic sheen and carp toughness made them a favourite even though purists do not class them as true nishikigoi.1
Fun facts for the dinner table
Recognised by the official bits
- Koi hobby
- Popular pond fish in the UK, though some keepers do not count it as a true nishikigoi1
The care rhythm Furry Diary remembers it for you
A typical home-care rhythm for a Ghost Koi. It is our own starting plan, not a vet's advice, and you can change every line in the app.
- FeedingOnly in the warm seasonevery day
- Pond checkevery day
- Water testevery 2 weeks
- Filter cleanevery month
Owner questions the things everyone asks
How often should I feed my Ghost Koi?
Feed your Ghost Koi once a day during the warm season, but stop feeding when the water drops below about 10°C. Furry Diary's starting plan suggests daily feeding only when it's warm, and always check the food label for amounts.1 Furry Diary plan
What does a Ghost Koi eat, and what should it never eat?
Ghost Koi are omnivores and do well on quality koi pellets, which mimic their natural diet of insects, worms, and plant matter. Never feed them bread or human foods, as these can harm their health.12
How much space does a Ghost Koi need?
A Ghost Koi needs a garden pond at least 1 meter deep, or about 1.5 meters in harsh winters, and it's too large for indoor aquariums. They are active fish that need room to forage and cruise.12
What temperature, light or water does a Ghost Koi need?
Ghost Koi thrive in water ideally between 15 and 25°C, with a pond that has a pump and filter. They need natural light but also shade, and water quality should be tested every two weeks as per Furry Diary's plan.1 Furry Diary plan
How often should I clean a Ghost Koi's home?
Clean the pond filter monthly and test the water every two weeks, as suggested by Furry Diary's starting plan. Daily pond checks help spot debris or issues early. Furry Diary plan
Can a Ghost Koi live with others?
Yes, Ghost Koi are peaceful and sociable, and they prefer to live in groups of five or more. They can also live with other koi or carp.12
How long does a Ghost Koi live?
The lifespan of a Ghost Koi varies, but with proper care in a suitable pond, they can live for many years. For specific estimates, ask a good breeder or an exotic-pet vet.
Can I handle a Ghost Koi?
Handling a Ghost Koi is not recommended, as it can stress the fish and damage its protective slime coat. Enjoy watching them from above, as they may even learn to recognise you.1
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Furry Diary's own starting care plan. A friendly guide, not a vet's advice.
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Where this comes from
Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at support@furrydiary.app and we will fix it.
- Wikipedia: Koi en.wikipedia.orgused for ghost koi origin, parentage, metallic scales, status, koi pond care, behaviour
- Wikipedia: Common carp en.wikipedia.orgused for carp body, diet, social behaviour, fun fact
- VCA Animal Hospitals: Feeding times and frequency for your dog vcahospitals.comused for owner questions
- ASPCA: Dog grooming tips aspca.orgused for owner questions
- ASPCA: Cat grooming tips aspca.orgused for owner questions
- ASPCA: People foods to avoid feeding your pets aspca.orgused for owner questions
- RSPCA: What to feed your rabbit rspca.org.ukused for owner questions
Checked 2026-09-30. Text is written in our own words from these sources.