Goldfish Variety Encyclopedia | Characteristics and Care Guide for 10 Popular Breeds | ブリちょく
Goldfish| ✍️ BreederDirect Editorial
Goldfish Variety Encyclopedia | Characteristics and Care Guide for 10 Popular Breeds
A detailed guide to the characteristics, temperament, care difficulty level, and tank size of 10 popular goldfish breeds including wakin, ryukin, ranchu, telescope eye, tanchō, and azuma-nishiki. Use this as a reference to choose the right breed for you.
Key Takeaways
A detailed guide to the characteristics, temperament, care difficulty level, and tank size of 10 popular goldfish breeds including wakin, ryukin, ranchu, telescope eye, tanchō, and azuma-nishiki. Use this as a reference to choose the right breed for you.
Related Species
Goldfish have undergone extensive selective breeding throughout their long history, and today there are dozens of recognized varieties. The appeal of goldfish lies in their collectability—body shape, tail fin form, scale texture, and coloring vary dramatically between breeds. As of 2026, breeders both domestically and internationally continue to actively develop new varieties, and many unique individuals are being listed on Br-Choku. Here, we introduce the characteristics and care tips for 10 representative breeds.
Comparison Table of 10 Popular Breeds
Breed
Body Type
Care Difficulty
Adult Size
Recommended Tank
Wakin
Carp-shaped
Easy
20–30 cm
60 cm+
Ryukin
Rounded
Moderate
15–20 cm
60 cm+
Ranchu
Rounded (no dorsal fin)
Somewhat difficult
15–20 cm
60 cm+ (shallow, wide type)
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※When mixing breeds with different body types, faster-swimming varieties tend to monopolize food. It's best to group breeds with similar body types together.
1. Wakin (Wild-type Goldfish)
The most common goldfish in Japan. With a body shape close to a carp, it's an excellent swimmer. Most goldfish seen at carnival goldfish-scooping games are wakin varieties. Hardy and easy to care for, they can even be kept outdoors in ponds.
Care Difficulty: Easy
Adult Size: 20–30 cm
Recommended Tank: 60 cm+
2. Ryukin
A breed characterized by a round, plump body shape. The tail fins, called triple-tail or quad-tail, spread out beautifully, creating an elegant swimming motion. They come in a variety of colors including red, white, and calico (red and white mottled).
Care Difficulty: Moderate
Adult Size: 15–20 cm
Recommended Tank: 60 cm+
3. Ranchu
Regarded as the "King of Goldfish," this is the most prestigious breed. It has no dorsal fin and features a prominent bump on the head called a "wen" (flesh mound). A classic show goldfish, high-quality specimens command premium prices. If you're interested in keeping ranchu seriously, check out Goldfish Annual Care Cost Guide.
Care Difficulty: Somewhat difficult
Adult Size: 15–20 cm
Recommended Tank: 60 cm+ (shallow, wide type is ideal)
4. Telescope Eye (Demekin)
Characterized by distinctly large, protruding eyes. With weaker eyesight and slower swimming speed, they are not suitable for mixed tanks with faster-swimming varieties like wakin. Varieties include black telescope eye and tri-color telescope eye.
Care Difficulty: Moderate
Adult Size: 12–20 cm
Recommended Tank: 60 cm+
5. Tanchō
A white-bodied breed with a red spot only on the head. Named after the red-crowned crane, this elegant appearance has made it quite popular. With its round body shape, it swims in a leisurely manner.
Care Difficulty: Moderate
Adult Size: 15–20 cm
Recommended Tank: 60 cm+
6. Azuma-Nishiki
An Oranda-type goldfish with beautiful tri-color calico markings (red, white, and black). With a wen on the head and no two individuals having identical patterns, it's highly valued. This breed is also popular in goldfish shows.
Care Difficulty: Moderate
Adult Size: 15–25 cm
Recommended Tank: 60 cm+
7. Ping Pong Pearl
An endearingly round breed characterized by spherical body shape and pearl-like scales. Particularly popular with women in recent years, it can be kept in smaller tanks. However, due to its unique body shape, it's prone to digestive disorders, particularly swim bladder disease. For disease prevention tips, see Goldfish Disease Prevention and Treatment.
Care Difficulty: Somewhat difficult
Adult Size: 8–12 cm
Recommended Tank: 45 cm+
8. Shubunkin
Featuring a carp-like body shape with calico markings mixing blue, red, white, and black. With a body shape similar to wakin, it's an excellent swimmer. Blue-toned calico varieties are particularly prized.
Care Difficulty: Easy
Adult Size: 20–30 cm
Recommended Tank: 60 cm+
9. Tosa-Kin
A regional variety originating from Kōchi Prefecture. Its defining feature is a large, curved tail fin, earning it the title "swimming artwork." Extremely difficult to care for, this breed is meant to be viewed from above.
A breed created by crossing ranchu with calico-type goldfish. With ranchu body shape and calico markings, it has a stunning appearance and is popular among collectors.
Care Difficulty: Somewhat difficult
Adult Size: 15–20 cm
Recommended Tank: 60 cm+
Choosing a Breed Without Failure
When selecting a goldfish breed, it's important to consider compatibility with your care environment, not just appearance preference. Beginners should start with hardy, easy-to-care-for carp-shaped varieties (wakin, comet, shubunkin), which naturally help you learn goldfish care basics. After gaining some experience, progressing to more delicate breeds like ryukin or ranchu types is the standard path.
Additionally, mixing breeds with different body types (carp-shaped and ryukin types, for example) in the same tank causes faster-swimming varieties to monopolize food, so it's best to keep breeds with similar body types together. A tank size of 60 cm or larger is recommended, with 10–20 liters of water per fish. Reference How to Choose Goldfish Tanks and Equipment to set up the optimal care environment.
Basics Beginners Should Know
The most important aspect of goldfish care is "maintaining water quality." Goldfish are heavy waste producers, so proper filter installation and regular water changes (weekly, about 1/3 of the tank volume) are fundamental to their health. Feed once or twice daily, aiming for amounts they can finish in 2–3 minutes, and promptly remove any uneaten food. The ideal water temperature is 18–26°C; avoiding sudden temperature fluctuations helps prevent disease.
When introducing new goldfish, keep them in their bag for 30 minutes to 1 hour to adjust the water temperature, then gradually add tank water to the bag to acclimate them to the water quality—this "water acclimatization" process is essential. If possible, quarantine new fish for 1–2 weeks to prevent disease introduction. For basic isolation management, also see Quarantine and Treatment Basics for New Fish.
For first-time goldfish keepers, we recommend first reading Beginner's Guide to Starting Goldfish Care to prepare your environment properly. Through Br-Choku, you can purchase goldfish directly from breeders who compete at shows. For those seeking individuals with clear bloodlines, this is a service worth utilizing. As of 2026, domestic goldfish breeders are increasingly focusing on direct sales through Br-Choku, expanding your options for rare varieties.
