1. Origin

·       Japanese Koi Fish: Originating from Japan, where they have been farmed and bred for centuries. It is home to Koi fish and home to many premium and traditional varieties of Koi.

·       Vietnamese Koi fish: Koi fish breeds raised and bred in Vietnam. They may have originated from Japanese Koi fish, but have undergone nurturing and breeding in Vietnam.

2. Values

· Japanese Koi fish: often of higher value, especially purebred and beautifully patterned Koi fish. They are considered the pinnacle of the aquarium world and are often played in competitions.

· Vietnamese Koi: often of lower value due to the failure to achieve the perfect level of Japanese Koi fish. However, they are still popular and suitable for Koi fish farmers with limited budgets.

3. Colors and patterns

·       Japanese Koi: Mixed from brood pairs with good gene sources from body to pattern and color,... are allocated and meet strict criteria and through many selections, so they often have bright, vibrant colors and more complex patterns. The color patches of Japanese Koi are clearly divided, not smeared. Especially, only Japanese Koi fish are deep red, white or yellow Koi in Japan can have a silvery color. The quality of colors and patterns is what determines their value.

·       Vietnamese Koi: There can be a variety of colors, but often does not reach the perfect level of Japanese Koi. The red color in Vietnamese Koi fish is usually reddish-orange or orange. They may have beautiful patterns, but are usually not as complex as Japanese Koi fish.

4. Shape

·       Japanese Koi fish: inherits good genetic resources and is extremely elaborate care from the habitat to high-quality nutrition... So they are larger in size, the growth potential can reach a size of more than a meter. The shark's body is stout and longer, the head and shoulders rafted out. At the same time they have large eyes, larger edge antennae and larger scales, the pectoral fins of Japanese Koi fish are thick and turbid. They are raised with a caring environment and a special diet to achieve large sizes.

·       Vietnamese Koi: usually smaller and not growing to a large size like Japanese Koi. They are suitable for small aquariums and do not require a special diet to grow.

5. Behavior

• Japanese Koi: has a relaxed, flexible, intelligent swimming posture and is easily attracted to humans. Therefore, Koi players can teach them to get used to their presence and create a sense of closeness like talking to special "friends".
• Vietnamese Koi fish: because it has only been domesticated for a short time, it is still shy of people and does not dare to contact people. This makes high-end koi lovers not really like them.

Note that the distinction between Japanese Koi fish and Vietnamese Koi fish may not always be simple and there are exceptions depending on the origin and nurturing process of each fish. However, an understanding of these fundamental differences can help you choose the right Koi fish for your needs and budget.