Hai una foto? Identifica i pesci all'istante con l'app Fishby.
Apri l'appDescrizione
Alburnus alburnus, commonly known as the Bleak, is a small, slender, and silvery freshwater fish belonging to the family Cyprinidae. It is a schooling species, often found in large numbers near the surface of clear, slow-moving waters. Known for its rapid movements and shimmering appearance, it plays a significant role in the food web of its native European habitats.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Dorsal side is dark greenish-blue to grey, flanks are bright silvery, and the belly is white. Fins are translucent, sometimes with a yellowish tint at the base.
- Tipo di squame
- cycloid
- Posizione della bocca
- superior
- Caratteristiche distintive
- Slender, laterally compressed body, Large, easily detachable scales, Prominent lateral line that runs straight along the body, Upward-pointing mouth
- Pinna dorsale
- Short, with 2-3 unbranched and 7-9 branched rays, originating behind the pelvic fins.
- Pinna caudale
- Deeply forked, with pointed lobes.
- Pinna pettorale
- Relatively long, reaching or nearly reaching the pelvic fin origin.
- Pinne distintive
- All fins are generally translucent, lacking prominent markings.
Consigli per l'identificazione
Body Shape and Coloration
Look for a slender, silvery body with a darker back and white belly. The scales are large and reflective.
Mouth Position
The mouth is distinctly upturned, indicating its surface-feeding habits.
Lateral Line
The lateral line is complete and runs straight along the middle of the body, not curving significantly.
Fin Placement
The dorsal fin originates behind the pelvic fins, a key characteristic for distinguishing it from some similar cyprinids.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in surface and mid-water layers, rarely deeper than 5 meters.
- Ambiente
- Prefers clear, slow-moving or still waters of rivers, lakes, canals, and reservoirs. Often found in open water but also near submerged vegetation or structures. Tolerant of a wide range of water conditions but thrives in well-oxygenated environments.
- Areale geografico
- Widespread across Europe, from the British Isles (excluding Ireland and northern Scotland) and France eastward to Russia, and south to the Balkans and Anatolia. Absent from Scandinavia north of 60°N.
Informazioni sull'acquario
- Livello di cura: intermediate
- Temperamento: peaceful
- Dieta: omnivore
- Dimensione minima della vasca: 200 liters (50 gallons) for a small school
- Temperatura: 10-22 °C (50-72 °F)
- Livello di pH: 6.5-7.5
- Durezza: 5-15 dGH
- Compatibilità: Compatible with other peaceful, similarly sized coldwater fish. Best kept in a species-specific tank or with other small cyprinids.
- Requisiti speciali: Requires well-oxygenated water with good filtration and plenty of open swimming space. Benefits from a planted tank with some hiding spots. Prone to stress in poor water conditions.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Active year-round, with increased feeding activity in warmer months. Spawning occurs from April to July.
- Prezzo di mercato: Low (primarily used for bait or fishmeal)
- Importanza commerciale: low
- Sapore: Mild, slightly earthy
- Consistenza: Soft, flaky, with numerous small bones
- Metodi di cottura: Frying, Pickling, Smoking
- Valore nutrizionale: Good source of protein and omega-3 fatty acids, though typically consumed in smaller quantities due to size and bones.
Fatti chiave
Mirror-like Scalesinteresting
The scales of Alburnus alburnus were historically used to produce 'essence d'orient', a pearlescent pigment used in artificial pearls.
Surface Dwellerbehavior
Bleak are predominantly surface feeders, often seen leaping out of the water to catch flying insects.
Schooling Behaviorbehavior
They form large, dense schools, especially when young, as a defense mechanism against predators.
Rapid Reproductioninteresting
Bleak have a high reproductive rate and short generation time, contributing to their widespread distribution and abundance.
Indicator Speciesinteresting
Due to their sensitivity to water quality, Bleak can serve as an indicator species for environmental health in freshwater ecosystems.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions are required. They are small and harmless. Care should be taken to minimize stress if caught for release.
Specie simili
Common Roach
Rutilus rutilus
Roach have red eyes and typically redder fins, especially the pelvic and anal fins. Their body is generally deeper and less slender than the Bleak. The dorsal fin of the Roach originates directly above or slightly in front of the pelvic fins.
Dace
Leuciscus leuciscus
Dace have a more rounded snout and a subterminal mouth. Their scales are smaller and more firmly attached. The dorsal fin of the Dace originates above the pelvic fins, and their fins are typically greyish.
Chub
Squalius cephalus
Chub are much larger and more robust, with a broader head and a larger mouth. Their scales are also larger and more firmly attached. The dorsal fin of the Chub originates above the pelvic fins.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Cypriniformes
- Famiglia
- Cyprinidae
- Genere
- Alburnus
- Specie
- Alburnus alburnus
Esplora Bleak
Identifica pesci ovunque
Gratis su iOS, Android e Web. Identificazione tramite foto, dettagli completi sulle specie e molto altro.