Scientific name Leucaspius delineatus
Descriptor Heckel
Year of description 1843
IUCN category LC
Family Cyprinidae
Genus Leucaspius
Leucaspius delineatus Leucaspius delineatus


Leucaspius delineatus, commonly known as sunbleak, is a fresh water fish.

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Who is it?


  • Average size
    6 cm
  • Maximum size
    9 cm
  • Longevity
    3 year
  • Average size
    6 cm
  • Maximum size
    9 cm
  • Longevity
    3 year

How to recognize the sunbleak ?

The sunbleak measures between 6 and 9 cm. This fish is unicolore with a predominantly argent and beige body.

Behaviour & Life cycle

  • diet
  • Sociability
  • territorial
  • Way of living

The sunbleak is a fish gregarious naturally found close to the surface. This species is carnivorous .

This species is territorial and does not appreciate the presence of intruders nearby, especially animals with similar behavior. It can also be virulent toward conspecifics. However, the sunbleak has little concern for non-territorial animals. In a constant quest for dominance, the dominant males of this species cannot stand each other. The battle between two individuals can be intense and violent. It will result in the submission and sometimes even death of one of the protagonists.


  • Reproduction
    ovipare qui pond sur substrat découvert

The sunbleak is a fish ovipare qui pond sur substrat découvert. This fish protects its eggs from nearby predators.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

Where to see this species?

What is its habitat?

Natural environment characteristics

  • Temperature
    2 - 32 °C
  • pH (acidity)
    6 - 10
  • gh (hardness)
    1 - 15
  • Flow

Biotope presentation

The sunbleak is most often found at a depth between 0m and 1m. However, it is not impossible to find this species at other depths. This animal evolves in areas characterized by a strong presence of vegetation (aquatic and marsh plants, decaying organic matter, roots...).

Species of the same biotope

To go further

Species of the same family

To read on the web

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Benoit Chartrer

Benoit Chartrer


Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

Bibliographic references

Belica Leucaspius delineatus (Cyprinidae) in Waterbodies of Southwest Siberia - E. A. Interesova - Journal of Ichthyology - 2012.

Red List of the ichthyofauna of the Czech Republic: Development and present status - Stanislav LUSK - Lubomír HANEL - Vûra LUSKOVÁ - Folia Zool. - 2004.

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Species of the same biotope

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