Izumo nankin goldfish is a breed of goldfish native to southwestern Japan. The fish have been heavily modified by breeders to have large, bulbous eyes. The Izumo nankin goldfish is also strikingly beautiful because of its unusual coloring and size which can reach up to 8 inches in length.
This goldfish is a popular optical illusion found on many blogs, websites, and social media channels. This illusion features a toy soldier with an enlarged head on an otherwise normal body.
Contents
How to identify Izumo nankin goldfish
There are two types of body types of the Izumo nankin goldfish is
- Long-bodied and
- Short-bodied type.

Izumo nankin will have elongated cephalothorax and fins. The large eyes and enlarged head on a normal body. The Izumo nankin goldfish is a very popular fish to purchase for both home aquariums and commercial fish farms.
Because of its unusual coloring, it is also very popular among breeders who want to sell their “show quality” goldfish, as well as collectors.
Color
The Izumo nankin goldfish has is dark gold in body color with a red back and orange fins and gills. The three color pattern is brown, red, and orange. Some fish have a lighter band on the fin white and gills are pink.
Behavioral Physical Characteristics
The Izumo nankin goldfish is an active fish that swims from side to side. It will also rest by keeping its body in a vertical position and its fins upright.
This fish typically swims on shoals, so not all members of the group are always visible. The light-colored pectoral fins can change to slightly darker colors in time, and the eyes will gradually lose color over time as well.
uses
The Izumo nankin goldfish is a popular fish for both home aquariums and commercial farms. Because of its unusual coloring, it is also very popular among breeders who want to sell their “show quality” goldfish, as well as collectors.

The Izumo nankin goldfish can be kept in a larger tank than other types of goldfish, up to 100 gallons (380 liters).
breeding system
The Izumo nankin goldfish can be bred in a large tank, with two other goldfish. These two fish will serve as the parents for the offspring. The juveniles of the fish are occasionally born with dark pectoral fins and distinctive eyes. The young fish will exhibit these characteristics until they become adults between three and five months old.
The rate at which eggs hatch will depend on temperature, around 73 degrees Fahrenheit (23 degrees Celsius) is ideal for hatching eggs. The eggs will hatch in two to three days at these temperatures.
Diet
The Izumo nankin goldfish is a carnivore and prefers to eat brine shrimp, Grindal worms, and baby brine shrimp.
Special Notes
The Izumo nankin goldfish can be kept in a larger tank than other types of goldfish, up to 100 gallons (380 liters). Because this fish has been so heavily modified by breeders, it does not do well in typical ponds.
This goldfish also requires more attention and care than other common varieties of goldfish. These factors make it more difficult to maintain healthy populations.
Best 14 information
Name | Izumo nankin goldfish |
Other Name | Izumonkinese, Izumo-nankin |
Origin | Japan |
Breed Class, size | Fancy |
Breed Purpose | Ornamental fish |
Type | Goldfish |
Diet Type | Omnivore |
Body Shape | Flat |
Temperature Range | 65-68 deg.F (18-20deg). |
Size | 6-8in (15-20cm) range of body and tail length. |
Climate Tolerance | Low temperatures |
Lifespan | 10-15 years |
Rarity | Common |
As Pets | Good for newbie |
Conclusion
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