The friendliness of Karashigoi koi, combined with their potential for impressive growth, makes them one of the most popular solid-color koi varieties. Meaning "mustard carp," their name signifies their yellow-green coloration, which can be pale or golden depending on lineage and lighting. While their subdued appearance may be deceptive, Karashigoi tend to grow into some of the most magnificent and largest fish in any pond.
Apart from their size, Karashigoi are distinguished by their friendly temperament. They are some of the most sociable koi. They quickly learn who their owner is, and during feeding time, they often swim straight to the hand that feeds them. This sociable trait has made them a favorite among koi keepers who want to watch their fish and actively participate in their care.
At Fitz's Fish Ponds, we are thrilled to offer these Karashigoi koi from leading Japanese breeders such as Marusei, Marudo, Maruhiro, Sakai, and Dainichi—each renowned for producing koi with exceptional coloration and impressive growth rates. If you’re looking for a focal point for your pond or want a koi to greet you whenever you step outside, our Karashigoi selection will exceed your expectations!
KARASHIGOI KOI FAQS: GROWTH, CARE, TEMPERAMENT & FEEDING TIPS
What is a Karashigoi koi? Meaning, color, and personality explained.
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A solid-colored koi with a yellow-green tint is known as a Karashigoi, or “mustard koi.” This variety is favored for its gentle temperament and significant growth potential.
Why are Karashigoi koi special? Growth size, sociable behavior.
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The size and behavior of these Koi fish are unique, as Karashigoi are said to grow exceptionally large and are often the most sociable koi in a pond.
How big do Karashigoi koi get? Jumbo growth facts and pond size tips.
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Under optimal conditions, karashigoi can reach lengths of 36 inches or more. They are among the fastest-growing types of koi and require ample living space in a larger pond for ideal growth.
Are Karashigoi koi suitable for beginners?
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They are strong, calm, and easy to care for, making Karashigoi an excellent choice for beginners. Their gentle temperament and feeding habits enhance the experience for novice koi keepers who want to interact with their fish.
Do Karashigoi koi get along with other koi varieties?
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Yes, they do get along. Karashigoi are non-aggressive and interact well with all other types of koi in community ponds.
What do Karashigoi koi eat? Best foods for growth and health.
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It’s best to use a protein-rich koi pellet to maximize their growth. Additionally, they can be given silkworm pupae and some vegetables as treats.
How do I care for Karashigoi koi during winter?
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They overwinter well in properly maintained ponds. A pond heater or de-icer helps oxygenate the water and protects the fish during the colder months.
Can I keep Karashigoi koi in a small pond?
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Due to their size potential, Karashigoi need a larger pond to thrive comfortably. Aim for deep ponds with good filtration and plenty of swimming space.
Are Karashigoi koi rare or common?
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Although they are becoming more popular, premium Karashigoi—especially those bred by top farms like Dainichi or Sakai—remain highly valued and are not always easy to find.
Why should I buy Karashigoi koi from Fitz's Fish Ponds?
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We work directly with renowned breeders such as Marusei, Marudo, and Sakai to provide our customers with the finest Karashigoi. Our team carefully chooses each fish based on its growth potential, color tone, and personality.
