Chinese bitterling (Rhodeus sinensis)

Family: Cyprinidae

A peaceful omnivore cyprinidae from the major river systems of China — moderate care.

Care parameters

Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
7.6–10.8 cm
Minimum tank
108 L
Water layer
Mid-water swimmer; keep 6+
Difficulty
Moderate
Temperament
Peaceful
Origin
China

Species overview

A Cyprinidae species native to China: Rhodeus sinensis lives mid-water swimmer; keep 6+ over clear streams, rivers and still waters. Peaceful. Adults reach 7.6–10.8 cm. It is one of the aquarium-kept Rhodeus species we profile, alongside Rhodeus fangi, Rhodeus lighti, Rhodeus ocellatus.

Native biotope

Habitat
Clear streams, rivers and still waters
Flow
Still to very gentle water
Dissolved O₂
Average oxygen needs

Aquascape & hardware

Substrate
Dark fine gravel or sand
Hardscape
Driftwood, water-worn stones and shelters that mimic the native biotope
Plants
Mixed planting with open swimming lanes

Temperament, diet & tankmates

Schooling
Keep 6+; larger groups settle better
Diet
Omnivore; quality prepared foods with variety
Recommended tankmates
  • Amur False Gudgeon — Similar size and water needs
  • China-Bitterling — Similar size and water needs
  • Acanthorhodeus chankaensis — Similar size and water needs
Avoid keeping with
  • Large aggressive cichlids — Bullying and injury risk
  • Known fin nippers — Constant stress and fin damage

Breeding & notes

Sexual dimorphism
Males are typically slimmer and more intensely colored; females fuller-bodied
Breeding method
Egg-scatterer over fine plants; condition with rich foods and simulate seasonal changes

Frequently asked questions

Is Rhodeus sinensis easy to keep?

Difficulty: moderate. Peaceful. Keep 6+; larger groups settle better.

What temperature and water chemistry does Rhodeus sinensis need?

Hold 18–26 °C and keep it stable — community-standard range; verify locally. Standard heater to hold the mid-range steadily.

How big does Rhodeus sinensis get, and what tank size?

Full size is 7.6–10.8 cm. Minimum tank: 108 L, with open swimming space along its mid-water swimmer; keep 6+ habits.

What does Rhodeus sinensis eat?

Omnivore; quality prepared foods with variety. It forages naturally over dark fine gravel or sand, so let some food reach the bottom.

Can Rhodeus sinensis live with other fish?

Peaceful. Recommended tankmates: Amur False Gudgeon — Similar size and water needs, China-Bitterling — Similar size and water needs, Acanthorhodeus chankaensis — Similar size and water needs. Avoid Large aggressive cichlids — Bullying and injury risk, Known fin nippers — Constant stress and fin damage.

Where does Rhodeus sinensis come from?

Comes from China: clear streams, rivers and still waters. Expect still to very gentle water and average oxygen needs.

How does Rhodeus sinensis breed?

In the aquarium: egg-scatterer over fine plants; condition with rich foods and simulate seasonal changes. Males are typically slimmer and more intensely colored; females fuller-bodied.