Lenok (Brachymystax lenok)

Family: Salmonidae

Lenok — a Salmonidae freshwater fish. Reaches 52.5–77 cm; keep at 20–26 °C.

Care parameters

Water temperature
20–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
52.5–77 cm
Minimum tank
500 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Peaceful community fish

Species overview

Brachymystax lenok is a Salmonidae. In the aquarium it stays peaceful community fish. Plan on 52.5–77 cm of adult fish at 20–26 °C. In a community tank it pairs well with Similar-sized peaceful community fish.

Native biotope

Habitat
Warm freshwater streams and lakes
Flow
Still to gentle current
Dissolved O₂
Moderate oxygen levels

Aquascape & hardware

Substrate
Fine sand and gravel
Hardscape
Driftwood and smooth stones
Plants
Hardy common aquarium plants

Temperament, diet & tankmates

Schooling
Small groups recommended
Diet
Omnivore; quality prepared foods
Recommended tankmates
  • Similar-sized peaceful community fish — Similar size and water needs
Avoid keeping with
  • Much smaller fish — May outcompete or bully tiny tankmates

Breeding & notes

Sexual dimorphism
Subtle external differences
Breeding method
Not documented in home aquaria

Frequently asked questions

Is Lenok easy to keep?

Difficulty: moderate. Peaceful community fish. Small groups recommended.

What temperature and water chemistry does Lenok need?

Set the heater to 20–26 °C and avoid swings. pH 6.5–7.5, GH 5–15 dGH suit it.

How big does Lenok get, and what tank size?

Expect 52.5–77 cm as an adult, living bottom-dwelling. A 500 L tank or larger gives it room.

What does Lenok eat?

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

Can Lenok live with other fish?

Yes, with care. Peaceful community fish — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.

Where does Lenok come from?

It lives in warm freshwater streams and lakes. Still to gentle current; Moderate oxygen levels.

Does Lenok jump?

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

How does Lenok breed?

In the aquarium: not documented in home aquaria. Subtle external differences.