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Bleak

Alburnus alburnus

Biological group : Fish

Family : Leuciscidae

Class : Actinopterygii

Order : Cypriniformes

Environment : Freshwater_brackish

Biology and behaviour

Habitat

Bleak mainly inhabit lakes and relatively calm sections of rivers and larger waterways. They commonly occupy open water and surface layers.

Behaviour

They are highly social fish and often form large shoals. They frequently swim close to the surface and feeding activity is particularly high during warmer periods.

Diet

They feed mainly on zooplankton, small crustaceans and aquatic or terrestrial insects reaching the water surface. They may also forage for small prey near the bottom.

Reproduction

Spawning occurs in spring and early summer in shallow areas, often over gravel, stones or vegetation.

Regulations

No verified regulatory rule has yet been published for this species in FLB.

Regulatory information will only be displayed once it has been linked to a specific jurisdiction and verified from an official source.