Contemplative Gourami

Ctenops nobilis

Photo of aquarium fish Contemplative Gourami
Natural range
  • Ganges River Basin
  • Brahmaputra River Basin
  • Eastern India area
  • Bangladesh
  • India
  • Nepal
Labyrinth fish Conservation status: Near threatened NT

Family:Osphronemidae

Other scientific names: Osphromenus nobilis, Osphronemus nobilis

The Noble Gourami, scientifically known as Ctenops nobilis, also referred to as the Threadfin or Contemplative Gourami, belongs to the family Osphronemidae. This species is characterized by its hardiness and unpretentiousness, making it relatively easy to keep and breed. However, it should be noted that males exhibit a rather belligerent disposition, which limits the range of possible tank mates.

Required aquarium volume
from 100 L
Size in aquarium
10 cm
Temperature
15 – 25 °C
Temperament
Semi-peaceful
Parameters
Temperature15 – 25 °C
Water pHSlightly acidic (5) – Neutral (7.5)
Water dHVery soft (1) – Hard (12)
Water salinityno salt (freshwater)
Size in aquarium10 cm
Lifespan8 years
TemperamentSemi-peaceful
Toward small fishnot a predator
Required aquarium volumefrom 100 L
Lightingdimmed
Substratesoft silted
Water flownone or stagnant (no flow)
Swimming levelnear the surface
FeedingAny (universal)
KeepingHarem
Jumpinghigh

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Contemplative Gourami get?

An adult reaches 10 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Contemplative Gourami need?

The recommended volume is 100 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Contemplative Gourami need?

Temperature 15–25 °C, pH 5–7.5, hardness 1–12 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Contemplative Gourami live?

Around 8 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Contemplative Gourami aggressive?

Temperament: semi-peaceful (including aggression during spawning / intraspecific conflicts). Keep this in mind when choosing tank mates.

How many Contemplative Gourami should be kept together?

Recommended setup: harem (1 male and several females). Ignoring this is a common cause of stress and disease.

What does Contemplative Gourami eat?

Diet type: any (universal). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Contemplative Gourami?

The scientific name of the species is Ctenops nobilis, family Osphronemidae. It also appears in the literature as: Osphromenus nobilis, Osphronemus nobilis.

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