Rhodeus spinalis — a Cyprinidae from China, peaceful; males spar gently in breeding dress. Reaches 7.5–11 cm; sociable; a larger group spreads any squabbles. 18–25 °C.
Care parameters
Water temperature
18–25 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
7.5–11 cm
Minimum tank
145 L
Water layer
Active throughout the water column
Difficulty
Moderate
Temperament
Peaceful; males spar gently in breeding dress
Origin
China
Species overview
Cyprinidae species Rhodeus spinalis comes from China. Like its relatives it depends on living freshwater mussels for breeding, so a fine-sand bed and settled water matter more than décor. It uses the whole water column. Adults reach 7.5–11 cm. Sociable; a larger group spreads any squabbles. Offer small foods in calm corners and keep the water stable — this fish forgives little else in the way of sloppiness. Maintain 18–25 °C at pH 6.5–7.5. Best suited to a keeper who can match its natural water.
Native biotope
Habitat
Clear streams and rivers over gravel
Flow
Moderate, well-oxygenated current
Dissolved O₂
Appreciates well-oxygenated water
Aquascape & hardware
Substrate
Fine gravel and sand
Hardscape
Water-worn stones and driftwood
Plants
Hardy rooted plants along the margins
Temperament, diet & tankmates
Schooling
Sociable; a larger group spreads any squabbles
Diet
Omnivore with a taste for vegetable foods and small live fare
Recommended tankmates
Other small peaceful cyprinids — Similar size, similar water
Avoid keeping with
Fin-nippers — Their flowing fins invite damage
Breeding & notes
Sexual dimorphism
Males often slimmer and more colourful
Breeding method
Spawns inside living freshwater mussels; no parental care