Hai una foto? Identifica i pesci all'istante con l'app Fishby.
Apri l'appDescrizione
Cynoscion othonopterus, commonly known as the Corvina Golfina or Gulf Corvina, is a species of marine fish belonging to the family Sciaenidae (drums and croakers). It is a commercially important species endemic to the upper Gulf of California, known for its annual spawning aggregation and subsequent fishery. This species exhibits a typical sciaenid body plan, characterized by an elongated, somewhat compressed body, a large mouth, and a silvery coloration. It is a predatory fish, feeding primarily on smaller fish and crustaceans.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Dorsal surface is typically silvery-gray to bluish-gray, fading to a bright silvery on the flanks and ventral side. Fins are generally dusky or yellowish. Juveniles may exhibit faint vertical bars.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Large, oblique mouth extending to or beyond the posterior margin of the eye., Two prominent canine-like teeth at the tip of the upper jaw., Absence of barbels on the chin., Lateral line slightly arched anteriorly, becoming straight posteriorly., A dark spot at the upper axil of the pectoral fin (though not always prominent).
- Pinna dorsale
- Two dorsal fins; the first is spiny with 9-11 spines, and the second is soft-rayed with 1 spine and 20-24 soft rays. The two fins are separated by a distinct notch.
- Pinna caudale
- Truncate to slightly emarginate (straight or slightly indented).
- Pinna pettorale
- Relatively long, reaching beyond the tip of the pelvic fin.
- Pinne distintive
- Anal fin with 2 spines and 8-10 soft rays. Pelvic fins thoracic, with 1 spine and 5 soft rays.
Consigli per l'identificazione
Mouth and Teeth
Look for a large, oblique mouth with two prominent canine-like teeth at the front of the upper jaw. This distinguishes it from many other sciaenids.
Dorsal Fins
Observe the two distinct dorsal fins, separated by a notch. The first is spiny, the second soft-rayed.
Geographic Location
If encountered in the upper Gulf of California, especially during the spawning season, it is highly likely to be Cynoscion othonopterus.
Absence of Chin Barbels
Unlike some other croakers, the Corvina Golfina lacks barbels on its chin.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Primarily found in shallow coastal waters, estuaries, and bays, typically from the surface down to about 30 meters (100 feet). During spawning, they aggregate in very shallow, turbid waters of river deltas.
- Ambiente
- Coastal marine environments, particularly estuarine areas and shallow sandy or muddy bottoms. They are euryhaline, tolerating a range of salinities, especially during their spawning migrations into river deltas.
- Areale geografico
- Endemic to the upper Gulf of California (Sea of Cortez), Mexico. Its distribution is largely restricted to the northernmost regions of the Gulf, particularly around the Colorado River Delta.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: Not suitable for typical home aquaria due to size and specialized habitat requirements. Requires very large, specialized public aquarium exhibits.
- Temperatura: 18-24°C (64-75°F)
- Livello di pH: 7.8-8.4
- Durezza: High (marine salinity)
- Compatibilità: Not compatible with most other fish due to predatory nature and size. Best kept in species-specific exhibits or with very large, robust tank mates.
- Requisiti speciali: Requires extremely large volumes of highly oxygenated, pristine marine water with strong filtration. Mimicking natural schooling behavior and providing ample swimming space is crucial. Not a common aquarium species.
Informazioni in natura
- Stato di conservazione: vulnerable
- Stagionalità: Spawning aggregations occur annually, typically from late February to early May, peaking in March and April. This period is the primary fishing season.
- Prezzo di mercato: Highly variable, often high due to demand and conservation concerns. Prices can fluctuate significantly based on season and legality.
- Importanza commerciale: high
- Sapore: Mild, firm, white flesh with a delicate flavor.
- Consistenza: Flaky, firm, and moist.
- Metodi di cottura: Grilled, Baked, Pan-fried, Steamed, Ceviche
- Valore nutrizionale: Good source of lean protein, omega-3 fatty acids, and various vitamins and minerals.
Fatti chiave
Spawning Aggregation Phenomenonbehavior
The Corvina Golfina is famous for its massive annual spawning aggregations in the shallow, turbid waters of the Colorado River Delta, where hundreds of thousands of individuals gather to reproduce. This event is accompanied by loud 'drumming' sounds produced by males.
Acoustic Communicationbehavior
Males produce distinct 'drumming' sounds using specialized muscles vibrating against their swim bladder during spawning. These sounds are crucial for attracting females and coordinating reproductive activities, and can be heard from considerable distances.
Endemic to the Upper Gulfinteresting
Cynoscion othonopterus is a true endemic species, found only in the northernmost reaches of the Gulf of California, making its population particularly vulnerable to localized environmental changes and overfishing.
Conservation Challengesinteresting
Despite its 'Vulnerable' status, the Corvina Golfina supports a significant artisanal fishery during its spawning season, leading to intense fishing pressure. Management efforts are in place but face challenges in balancing economic needs with conservation.
Ecological Rolebehavior
As a significant predator in its ecosystem, the Corvina Golfina plays a crucial role in regulating populations of smaller fish and crustaceans, contributing to the overall health and balance of the upper Gulf of California's food web.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions beyond standard fish handling. Be mindful of sharp fin spines and teeth when handling to avoid cuts. No venomous structures.
Specie simili
Totoaba
Totoaba macdonaldi
The Totoaba is a much larger species, reaching over 2 meters in length, with a more robust body and a more pointed snout. While historically confused, the Totoaba is critically endangered and legally protected, making accurate identification crucial. Totoaba also has a more pronounced dark spot at the pectoral fin axil and generally larger scales.
Orangemouth Corvina
Cynoscion xanthulus
Cynoscion xanthulus typically has a yellowish or orange coloration inside its mouth, which C. othonopterus lacks. C. xanthulus also has a more widespread distribution in the Gulf of California and Pacific coast.
Shortfin Corvina
Cynoscion parvipinnis
C. parvipinnis generally has shorter pectoral fins and a more slender body. Its distribution overlaps, but C. othonopterus is more restricted to the upper Gulf.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Perciformes
- Famiglia
- Sciaenidae
- Genere
- Cynoscion
- Specie
- Cynoscion othonopterus
Esplora Corvina Golfina
Identifica pesci ovunque
Gratis su iOS, Android e Web. Identificazione tramite foto, dettagli completi sulle specie e molto altro.