🐟 Ryukin Goldfish Care Sheet

🔹 Overview

Category	Details
Scientific Name	Carassius auratus (Ryukin variety)
Common Name	Ryukin Goldfish
Origin	China & Japan (selectively bred)
Adult Size	15–20 cm (6–8 in), sometimes larger
Lifespan	10–15 years (up to 20+ with excellent care)
Temperament	Peaceful, social
Tank Level	Mid-level

---

🔹 Tank Setup

Parameter	Ideal Range
Tank Size	75+ liters (20+ gallons) for one; +40 liters per additional fish
Temperature	18–23 °C (64–74 °F)
pH	6.5–7.8
Hardness	5–15 dGH
Substrate	Smooth gravel or sand
Decor	Smooth rocks, hardy plants, open swimming space
Lighting	Low to moderate
Filtration	Strong filtration; goldfish produce heavy waste

Tips:

• Avoid sharp decorations—Ryukins have delicate fins.

• Provide high oxygenation and strong filtration to handle waste.

• Best in larger tanks due to size and activity level.

---

🔹 Diet

• Type: Omnivorous

• Best Foods: High-quality sinking goldfish pellets, gel foods, blanched vegetables (peas, spinach, zucchini), occasional frozen foods (bloodworms, brine shrimp).

• Feeding Frequency: 1–2 small meals daily; avoid floating foods to reduce swim bladder issues.

---

🔹 Behavior & Compatibility

• Peaceful and social; best kept with other fancy goldfish.

• Slow swimmers—may struggle competing with fast tankmates.

• Do not keep with fin-nippers or tropical fish requiring high temps.

---

🧭 Tank Mate Guide

✅ Compatible Species

• Other fancy goldfish varieties (e.g., Oranda, Fantail, Ranchu)

• Weather loaches (in cooler setups)

• White Cloud Mountain Minnows (in large tanks only)

⚠️ Avoid or Use Caution With

• Comet or Common goldfish (too fast and aggressive eaters)

• Tropical fish requiring higher temps

• Fin-nippers or aggressive species

---

🐣 Breeding Info

• Spawning Method: Egg scatterers; use spawning mops or dense plants.

• Parental Care: None; adults will eat eggs.

• Fry Care: Feed infusoria or powdered fry food, then baby brine shrimp.

---

🌿 Fun Facts

• Known for its high dorsal hump and deep, rounded body shape.

• One of the oldest and most popular fancy goldfish varieties.

• Their unique “chubby” body makes them prone to buoyancy issues, so sinking foods are ideal.

---