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Argyrosomus japonicus, commonly known as Corvina, Mulloway, or Japanese Meagre, is a large, predatory sciaenid fish found in coastal waters of the Indo-Pacific. It is highly valued as a food fish and a popular target for recreational anglers due to its size and fighting ability. This species is characterized by its elongated, silvery body, distinct lateral line, and a prominent drumming sound produced by males during spawning.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Silvery-grey to bronze on the dorsal surface, fading to a lighter, often silvery-white belly. Fins are typically dusky or yellowish. Juveniles may have faint vertical bars or spots.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Prominent lateral line, often with a series of small, white spots along its length., Large, terminal mouth with small, sharp teeth., A characteristic 'drumming' sound produced by males during spawning, generated by vibrating muscles against the swim bladder., Large scales.
- Pinna dorsale
- Two dorsal fins; the first is spiny (8-10 spines), and the second is soft-rayed (1 spine, 25-29 soft rays). The two fins are separated by a distinct notch.
- Pinna caudale
- Truncate to slightly emarginate caudal fin.
- Pinna pettorale
- Moderately long pectoral fins.
- Pinne distintive
- Anal fin with 2 spines and 7-8 soft rays. Pelvic fins thoracic.
Consigli per l'identificazione
Size and Shape
Large, robust fish, typically growing to 1.5-2 meters (5-6.5 feet) in length and weighing over 70 kg (150 lbs), though most caught specimens are smaller. Elongated, somewhat compressed body.
Coloration
Silvery-grey to bronze back, silvery belly. Fins often dusky or yellowish. Look for the subtle iridescent sheen.
Lateral Line
The lateral line is very distinct and often marked with a series of small, pale spots, particularly noticeable on larger specimens.
Mouth and Teeth
Large, oblique mouth extending to below the eye, with small, sharp, conical teeth arranged in bands.
Dorsal Fins
Two distinct dorsal fins, the first spiny and the second soft-rayed, separated by a clear notch.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow coastal waters, estuaries, and surf zones, from the surface down to about 100 meters (330 feet). Juveniles often inhabit estuaries and protected bays.
- Ambiente
- Prefers sandy or muddy bottoms, often associated with rocky reefs, seagrass beds, and estuarine environments. Tolerant of a wide range of salinities, especially juveniles in estuaries.
- Areale geografico
- Indo-West Pacific: East coast of Africa (South Africa, Mozambique), through the Indian Ocean, to Australia (southern and eastern coasts), and Japan. Also found in the Persian Gulf.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: Not suitable for home aquaria due to its large size and predatory nature. Requires extremely large public aquarium exhibits.
- Temperatura: 18-24°C (64-75°F)
- Livello di pH: 7.8-8.4
- Durezza: 1.020-1.025 SG
- Compatibilità: Only compatible with very large, robust fish of similar size in extremely large, specialized exhibits. Highly predatory towards smaller fish.
- Requisiti speciali: Requires immense tank volume, powerful filtration, and a diet of large live or frozen fish and crustaceans. Not a species for typical aquarium enthusiasts.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawning aggregations typically occur in late spring to early summer, making them more accessible to fisheries during these periods. Availability can vary regionally based on local fishing regulations and migratory patterns.
- Prezzo di mercato: High, varies significantly by region and season, often fetching premium prices.
- Importanza commerciale: high
- Sapore: Mild, sweet, and delicate flavor.
- Consistenza: Firm, white, flaky flesh with a medium oil content.
- Metodi di cottura: Baking, Grilling, Frying, Steaming, Sashimi
- Valore nutrizionale: Excellent source of lean protein, Omega-3 fatty acids, and various vitamins and minerals.
Fatti chiave
Drumming Fishbehavior
Males of Argyrosomus japonicus produce a distinctive 'drumming' sound during spawning by vibrating specialized muscles against their swim bladder. This sound is used to attract mates and can be heard from considerable distances underwater.
Longevityinteresting
Argyrosomus japonicus is a long-lived species, with individuals known to live for over 30 years, reaching sexual maturity relatively late in life.
Estuarine Nurseriesbehavior
Juvenile Corvina heavily rely on estuarine environments as critical nursery grounds, benefiting from the abundant food resources and protection from larger predators before migrating to open coastal waters.
Angler's Prizeinteresting
Due to its large size, powerful fighting ability, and excellent table qualities, Argyrosomus japonicus is a highly sought-after species by recreational anglers, often considered a trophy fish.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No venomous spines. Handle with care due to its large size and powerful thrashing. The operculum (gill cover) and fin spines can be sharp, so gloves are recommended to prevent cuts. When releasing, support the fish horizontally and ensure it is revived before letting it go.
Specie simili
Teraglin
Atractoscion aequidens
Teraglin generally has a more slender body, a more pointed snout, and typically lacks the distinct white spots along the lateral line. Its caudal fin is more deeply forked than the truncate caudal fin of Argyrosomus japonicus. The second dorsal fin of Teraglin is also typically shorter relative to its body length.
Black Jewfish
Protonibea diacanthus
Black Jewfish typically have a darker, more bronze to blackish coloration, especially on the dorsal surface. They often exhibit a series of dark spots or blotches on their flanks, which are absent in Argyrosomus japonicus. The mouth is also generally larger and more oblique in Protonibea diacanthus.
Other Sciaenids (e.g., various Croakers)
Various genera within Sciaenidae
Many other sciaenids are generally smaller, have different fin counts, or lack the specific combination of a large, elongated body, distinct lateral line spots, and the characteristic drumming sound of Argyrosomus japonicus. Careful examination of fin ray counts, scale patterns, and overall body proportions is necessary for precise differentiation.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Acanthuriformes
- Famiglia
- Sciaenidae
- Genere
- Argyrosomus
- Specie
- Argyrosomus japonicus
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