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Apri l'appDescrizione
Sciaena deliciosa, commonly known as Corvina, is a demersal marine fish belonging to the family Sciaenidae (drums or croakers). It is a highly valued commercial and recreational species, particularly along the Pacific coast of South America. This species is characterized by its robust body, silvery coloration, and distinctive head morphology. It is known for its excellent flesh quality, making it a popular target for fisheries.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Generally silvery-grey to brownish-silver dorsally, fading to a lighter, often whitish, ventral surface. Fins are typically dusky or yellowish. Juveniles may exhibit faint vertical bars that fade with age. The operculum often has a dark spot.
- Tipo di squame
- ctenoid
- Posizione della bocca
- subterminal
- Caratteristiche distintive
- Robust, slightly compressed body., Large head with a relatively small, subterminal mouth., A single, short barbel on the chin (though sometimes absent or rudimentary in adults)., Strongly ctenoid scales covering the body and head., Lateral line distinctly arched anteriorly, becoming straight posteriorly., Preopercle margin serrated.
- Pinna dorsale
- Two dorsal fins, deeply notched or separated. The first dorsal fin has 10-11 strong spines; the second dorsal fin has 1 spine and 23-26 soft rays. The soft-rayed portion is long.
- Pinna caudale
- Truncate to slightly emarginate caudal fin.
- Pinna pettorale
- Moderately long pectoral fins, typically reaching beyond the pelvic fin origin.
- Pinne distintive
- Anal fin with 2 spines and 7-8 soft rays. Pelvic fins thoracic, with 1 spine and 5 soft rays.
Consigli per l'identificazione
Body Shape and Coloration
Look for a robust, silvery-grey body with a lighter belly. The overall impression is of a sturdy, somewhat elongated fish.
Head and Mouth
Note the large head and the subterminal mouth. The presence of a small, often inconspicuous, chin barbel is a key characteristic, though it can be difficult to see or absent in some individuals.
Dorsal Fins
Observe the two distinct dorsal fins, with the first spiny and the second much longer and soft-rayed. The deep notch between them is characteristic.
Lateral Line
Trace the lateral line; it will be noticeably arched over the pectoral fin before straightening towards the tail.
Opercular Spot
Check for a dark spot on the upper part of the operculum (gill cover), which is often present.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow coastal waters, from the surf zone down to depths of approximately 50 meters (164 feet).
- Ambiente
- Inhabits sandy and muddy bottoms, often near rocky reefs, estuaries, and coastal lagoons. Juveniles are frequently found in shallower, protected areas.
- Areale geografico
- Eastern Pacific Ocean, primarily along the coast of South America, from northern Peru south to central Chile. Its distribution is largely associated with the Humboldt Current system.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: semi-aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 500 gallons
- Temperatura: 18-24°C (64-75°F)
- Livello di pH: 8.1-8.4
- Durezza: 1.020-1.025 SG
- Compatibilità: Best kept in a species-specific tank or with other large, robust, semi-aggressive marine fish that can tolerate similar water parameters and are not small enough to be considered prey. Avoid keeping with smaller, docile species.
- Requisiti speciali: Requires a very large tank with ample swimming space and strong filtration due to its size and predatory nature. A sand or fine gravel substrate is preferred as they may root around. Live rock structures for hiding and territorial demarcation are beneficial. Maintaining pristine water quality is crucial.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Available year-round, but peak fishing seasons can vary regionally, often influenced by spawning aggregations and local regulations.
- Prezzo di mercato: High, varies significantly by region and season, often fetching premium prices in seafood markets.
- Importanza commerciale: high
- Sapore: Mild, sweet, and delicate flavor.
- Consistenza: Firm, flaky, and moist white flesh.
- Metodi di cottura: Grilled, Baked, Pan-fried, Ceviche, Steamed
- Valore nutrizionale: Excellent source of lean protein, omega-3 fatty acids, and various vitamins and minerals (e.g., B vitamins, phosphorus, selenium).
Fatti chiave
Sound Productionbehavior
Like many members of the Sciaenidae family, Sciaena deliciosa possesses a specialized swim bladder and associated muscles that allow it to produce drumming or croaking sounds, particularly during spawning or territorial displays.
Ecological Roleinteresting
As a demersal predator, Corvina plays an important role in its ecosystem by preying on benthic invertebrates and smaller fish, helping to regulate their populations.
Cultural Significanceinteresting
In Peru and Chile, Corvina is a highly prized food fish and a staple in local cuisine, particularly famous for its use in ceviche.
Growth and Sizerecord
Sciaena deliciosa can reach a maximum reported length of about 90 cm (35 inches) and a weight of over 9 kg (20 lbs), though most commonly encountered individuals are smaller, typically 30-60 cm.
Reproductionbehavior
Corvina are batch spawners, releasing eggs multiple times over a spawning season. Spawning aggregations are often targeted by fisheries.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: Corvina are generally safe to handle. Care should be taken with the spiny dorsal fin, as spines can cause minor punctures. No venom is associated with this species.
Specie simili
White Croaker
Genyonemus lineatus
While also a sciaenid, Genyonemus lineatus is typically smaller, has a more slender body, and a more pronounced chin barbel. Its geographic range is further north (California to Baja California).
California Corbina
Menticirrhus undulatus
Menticirrhus undulatus has a much longer, more prominent chin barbel and lacks a swim bladder (unlike Sciaena deliciosa), which affects its sound production. Its body is also more elongated and less deep-bodied than S. deliciosa.
Other Sciaena species
Various Sciaena spp.
Distinguishing S. deliciosa from other Sciaena species can be challenging and often requires careful examination of fin ray counts, scale patterns, and specific head morphology. Geographic distribution is also a key differentiator, as S. deliciosa is restricted to the southeastern Pacific.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Acanthuriformes
- Famiglia
- Sciaenidae
- Genere
- Sciaena
- Specie
- Sciaena deliciosa
Esplora Corvina
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