Fishician®Diet
Omnivore – high-quality sinking pellets, gel food, blanched vegetables
Aquarium species profile
Ranchu
Carassius auratus (Ranchu variety) · Captive-bred (Japan)
Minimum tank40 gal (single fish)
Adult size5–7"
Care levelHard
TemperamentPeaceful
Temperature65–75°F
pH range6.5–7.5
Compatible tank mates
Other Ranchus or similar slow fancy goldfish
Tank mates to avoid
Single-tail goldfish, fast swimmers, sharp décor
Care notes
Called 'King of Goldfish' in Japan. No dorsal fin; dramatic head growth (wen). Poor swimmer; very prone to swim bladder issues. Pristine water required.
Check the whole aquarium. Tank size alone does not establish compatibility. Confirm adult size, water overlap, social grouping, territory, diet, and the individual animals before stocking.