Blackbelly (Xenocypris macrolepis)

Family: Cyprinidae

A peaceful algivore cyprinidae from the Yangtze, Yellow and Pearl rivers of China — moderate care.

Care parameters

Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
24.2–34.6 cm
Minimum tank
346 L
Water layer
Mid-water swimmer; keep 5+
Difficulty
Moderate
Temperament
Peaceful
Origin
Yellow River basin, China

Species overview

Xenocypris macrolepis is a Cyprinidae from Yellow River basin, China. In the wild it prefers clear streams, rivers and still waters; in the aquarium it stays peaceful. Plan on 24.2–34.6 cm of adult fish at 18–26 °C. Related profiles: Xenocypris davidi, Xenocypris fangi, Xenocypris yunnanensis.

Native biotope

Habitat
Clear streams, rivers and still waters
Flow
Moderate flow
Dissolved O₂
Average oxygen needs

Aquascape & hardware

Substrate
Smooth gravel and sand with open floor space
Hardscape
Driftwood, water-worn stones and shelters that mimic the native biotope
Plants
Hardy plants on hardscape; keep the floor open

Temperament, diet & tankmates

Schooling
Keep 5+; larger groups settle better
Diet
Algivore; 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
Spawning; condition with rich foods and simulate seasonal changes

Frequently asked questions

Is Blackbelly easy to keep?

Difficulty: moderate. Peaceful. Keep 5+; larger groups settle better.

What temperature and water chemistry does Blackbelly 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 Blackbelly get, and what tank size?

Adults reach 24.2–34.6 cm; it is mid-water swimmer; keep 5+. Plan for at least 346 litres.

What does Blackbelly eat?

Algivore; quality prepared foods with variety. Vary the menu — quality flakes or pellets plus frozen or live foods.

Can Blackbelly 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 Blackbelly come from?

Comes from Yellow River basin, China: clear streams, rivers and still waters. Expect moderate flow and average oxygen needs.

How does Blackbelly breed?

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