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Apri l'appDescrizione
Chelidonichthys obscurus, commonly known as the Longfin Gurnard or Scorfano di fondale, is a demersal fish belonging to the family Triglidae. It is characterized by its robust body, large head encased in bony plates, and prominent pectoral fins that resemble wings. This species is well-adapted to benthic life, utilizing its modified pectoral fin rays to 'walk' along the seabed and detect prey. Its coloration provides effective camouflage against various substrates.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Dorsal surface typically reddish-brown to greyish-brown, often mottled or spotted, providing camouflage. Ventral surface is paler, whitish. Pectoral fins are often brightly colored on the inner surface, ranging from blue to green with dark spots or bands, serving as a warning or display.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Large, bony head with prominent ridges and spines., Three free, finger-like rays at the bottom of each pectoral fin, used for locomotion and sensing prey., Large, fan-like pectoral fins, often with striking coloration on the inner surface., Two distinct dorsal fins.
- Pinna dorsale
- First dorsal fin with 9-11 spines; second dorsal fin with 16-18 soft rays. The first dorsal fin is typically higher than the second.
- Pinna caudale
- Caudal fin is truncate or slightly emarginate.
- Pinna pettorale
- Large and wing-like, extending beyond the origin of the anal fin. The three lowermost rays are free and thickened.
- Pinne distintive
- Pelvic fins are thoracic, located beneath the pectoral fins.
Consigli per l'identificazione
Head Morphology
Observe the large, bony head with prominent ridges and spines. The snout is relatively short and blunt compared to some other gurnard species.
Pectoral Fins
Note the size and coloration of the pectoral fins. The inner surface is often vividly colored (blue, green, or blackish) with distinct spots or bands. Crucially, identify the three free, detached rays at the bottom of each pectoral fin.
Lateral Line
The lateral line is distinct and runs along the body, often with small bony scutes.
Body Coloration
The overall reddish-brown to greyish-brown mottled pattern on the dorsal side is characteristic, aiding in camouflage on the seabed.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found on sandy, muddy, or gravelly bottoms from shallow coastal waters (around 20 meters) down to depths of approximately 200 meters, occasionally deeper.
- Ambiente
- Demersal, preferring soft substrates where it can partially bury itself or forage for benthic invertebrates. Often found in areas with mixed sand and mud, or near rocky outcrops.
- Areale geografico
- Eastern Atlantic Ocean, from the British Isles south to Mauritania, including the Mediterranean Sea and the Black Sea. It is particularly common in the Mediterranean.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: semi-aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 500 gallons
- Temperatura: 15-20°C (59-68°F)
- Livello di pH: 8.1-8.4
- Durezza: 1.020-1.025 SG
- Compatibilità: Best kept in a species-specific tank or with very large, robust, non-aggressive fish that occupy different water columns. Avoid small fish or invertebrates as they will be prey.
- Requisiti speciali: Requires a large tank with a soft sand or fine gravel substrate for burrowing and foraging. Ample hiding spots with rockwork are beneficial. Excellent filtration and stable water parameters are crucial. Not typically suited for home aquaria due to size, specialized diet, and environmental needs.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Available year-round, but fishing efforts may vary seasonally based on local regulations and weather conditions.
- Prezzo di mercato: Varies by region and season, generally moderate.
- Importanza commerciale: medium
- Sapore: Mild, delicate, slightly sweet flavor.
- Consistenza: Firm, white, flaky flesh.
- Metodi di cottura: Baked, Grilled, Fried, Steamed, Used in soups and stews
- Valore nutrizionale: Good source of lean protein, low in fat, contains Omega-3 fatty acids.
Fatti chiave
Walking Fishbehavior
Chelidonichthys obscurus uses its three free, finger-like pectoral fin rays to 'walk' along the seabed, probing the substrate for food. These rays are highly sensitive chemoreceptors and mechanoreceptors.
Sound Productionbehavior
Like other gurnards, C. obscurus can produce grunting or croaking sounds by vibrating its swim bladder using specialized muscles. These sounds are thought to be used for communication, especially during spawning or when disturbed.
Camouflage Masteramazing
The mottled coloration of the Longfin Gurnard allows it to blend seamlessly with the sandy or muddy seafloor, making it an effective ambush predator and helping it avoid detection by larger predators.
Pectoral Fin Displaybehavior
The brightly colored inner surface of the pectoral fins is often flashed when the fish is startled or threatened, likely serving as a warning display to potential predators.
Informazioni di sicurezza
Velenoso- Livello di sicurezza: venomous
- Velenoso: Sì
- Commestibilità: edible
- Note sul maneggio: Gurnards possess venomous spines on their dorsal fin and operculum (gill covers). While not typically life-threatening, a sting can be very painful, causing localized swelling, redness, and throbbing pain that can last for several hours. Handle with extreme caution, using thick gloves or a towel to avoid direct contact with spines. If stung, immerse the affected area in hot water (as hot as can be tolerated without scalding, typically 45-50°C) for 30-90 minutes to denature the protein-based venom. Seek medical attention if symptoms are severe or persist.
Specie simili
Red Gurnard
Chelidonichthys cuculus
The Red Gurnard typically has a more uniformly reddish body coloration and lacks the prominent blue or green coloration on the inner pectoral fins. Its head is also less spiny and more rounded than C. obscurus.
Grey Gurnard
Eutrigla gurnardus
The Grey Gurnard is generally greyish-brown, often with darker spots, and its pectoral fins are typically duller, lacking the vibrant inner coloration of C. obscurus. It also has a more slender body profile and a less spiny head.
Streaked Gurnard
Trigloporus lastoviza
While sometimes confused due to similar habitat, T. lastoviza has a more elongated body, a more pointed snout, and often exhibits distinct dark streaks or bands along its flanks. Its pectoral fins also have a different pattern and less intense coloration than C. obscurus.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Scorpaeniformes
- Famiglia
- Triglidae
- Genere
- Chelidonichthys
- Specie
- obscurus
Esplora Longfin Gurnard
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