Big-scalled redfin (Tribolodon hakonensis)

Family: Cyprinidae

Big-scalled redfin — a Cyprinidae from Japan & the Korean Peninsula, calm, undemanding and well-suited to community life. Reaches 11.2–16.5 cm; small groups recommended. 18–26 °C.

Care parameters

Water temperature
18–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
11.2–16.5 cm
Minimum tank
327 L
Water layer
Active throughout the water column
Difficulty
Moderate
Temperament
Calm, undemanding and well-suited to community life
Origin
Japan and Korea

Species overview

Tribolodon hakonensis, a member of the family Cyprinidae, comes from Japan and Korea, where it inhabits clear streams and rivers over gravel. Calm, undemanding and well-suited to community life and unfussy omnivore; varied diet keeps condition, it grows to 11.2–16.5 cm and adapts well to a properly set-up aquarium in the 18–26 °C range. Other Tribolodon species in our database include Tribolodon brandtii.

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
Small groups recommended
Diet
Unfussy omnivore; varied diet keeps condition
Recommended tankmates
  • Robust schooling cyprinids — Add activity without conflict
Avoid keeping with
  • Much larger predators — Risk at night

Breeding & notes

Sexual dimorphism
Males often slimmer and more colourful
Breeding method
Spawns freely; remove parents to save the eggs

Frequently asked questions

Is Big-scalled redfin easy to keep?

Difficulty: moderate. Calm, undemanding and well-suited to community life. Small groups recommended.

What temperature and water chemistry does Big-scalled redfin need?

Hold 18–26 °C and keep it stable — 18–26 °C typical for the family. Room temperature to heated, depending on origin.

How big does Big-scalled redfin get, and what tank size?

Expect 11.2–16.5 cm as an adult, living active throughout the water column. A 327 L tank or larger gives it room.

What does Big-scalled redfin eat?

Unfussy omnivore; varied diet keeps condition. It forages naturally over fine gravel and sand, so let some food reach the bottom.

Can Big-scalled redfin live with other fish?

Calm, undemanding and well-suited to community life. Recommended tankmates: Robust schooling cyprinids — Add activity without conflict. Avoid Much larger predators — Risk at night.

Where does Big-scalled redfin come from?

Its home waters are Japan and Korea — clear streams and rivers over gravel, with moderate, well-oxygenated current.

Does Big-scalled redfin jump?

Not a noted jumper — a standard cover still keeps dust and spray in.

How does Big-scalled redfin breed?

Spawns freely; remove parents to save the eggs. Males often slimmer and more colourful.