Gobiocypris rarus

Family: Cyprinidae

A peaceful omnivore cyprinidae from the upper Yangtze in China (Sichuan) — beginner-friendly.

Care parameters

Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
4.1–5.9 cm
Minimum tank
59 L
Water layer
Mid-water swimmer; keep 6+
Difficulty
Easy
Temperament
Peaceful
Origin
upper Yangtze, China

Species overview

Gobiocypris rarus is a Cyprinidae from upper Yangtze, China. In the wild it prefers clear streams, rivers and still waters; in the aquarium it stays peaceful. Plan on 4.1–5.9 cm of adult fish at 18–26 °C. In a community tank it pairs well with Amur False Gudgeon, China-Bitterling.

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 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
Spawning; condition with rich foods and simulate seasonal changes

Frequently asked questions

Is Gobiocypris rarus easy to keep?

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

What temperature and water chemistry does Gobiocypris rarus need?

Aim for 18–26 °C. Standard heater to hold the mid-range steadily; community-standard range; verify locally.

How big does Gobiocypris rarus get, and what tank size?

Full size is 4.1–5.9 cm. Minimum tank: 59 L, with open swimming space along its mid-water swimmer; keep 6+ habits.

What does Gobiocypris rarus eat?

Omnivore; quality prepared foods with variety. Feed two small meals a day rather than one large one.

Can Gobiocypris rarus live with other fish?

Yes, with care. Peaceful — pair it with Amur False Gudgeon — Similar size and water needs, China-Bitterling — Similar size and water needs, Acanthorhodeus chankaensis — Similar size and water needs and skip Large aggressive cichlids — Bullying and injury risk, Known fin nippers — Constant stress and fin damage.

Where does Gobiocypris rarus come from?

Native to upper Yangtze, China, where it lives in clear streams, rivers and still waters. Moderate flow; Average oxygen needs.

How does Gobiocypris rarus breed?

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