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Dactylopterus volitans, commonly known as the Flying Gurnard, is a fascinating marine fish characterized by its exceptionally large, wing-like pectoral fins. Despite its common name, it does not truly fly out of the water like flying fish (family Exocoetidae), but rather uses its pectoral fins to 'glide' or 'walk' along the seabed and for display. It is a benthic species, typically found on sandy or muddy bottoms in tropical and subtropical waters.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Variable, typically mottled brown, green, or grey on the dorsal side, with lighter ventral surfaces. The large pectoral fins are often brightly colored with iridescent blues, greens, and yellows, and may have dark spots or ocelli, especially on the inner surface. This coloration is primarily for display and startling predators.
- Tipo di squame
- none
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Enlarged, wing-like pectoral fins that can be spread wide, Large, bony head with a steep profile and prominent eyes, Two separate dorsal fins, the first with short, strong spines, Body covered in bony scutes rather than typical scales, Pelvic fins located far forward, almost under the throat
- Pinna dorsale
- Two dorsal fins: the first with 2 free spines followed by 4-5 short, strong spines; the second with 8 soft rays. The first two spines are often detached and used as feelers.
- Pinna caudale
- Caudal fin is slightly emarginate or truncate.
- Pinna pettorale
- Extremely large and fan-like, divided into two sections: a smaller anterior part and a much larger posterior part that extends well beyond the caudal fin when fully spread. These fins are supported by numerous rays (typically 28-30).
- Pinne distintive
- The first two dorsal spines are separate from the rest of the dorsal fin and can be moved independently. The pelvic fins are thoracic, positioned anterior to the pectoral fins, and have 1 spine and 4 soft rays.
Consigli per l'identificazione
Pectoral Fins
The most striking feature is the enormous, fan-like pectoral fins. When spread, they resemble wings and are often brightly colored. These are much larger and more elaborate than those of true gurnards (family Triglidae).
Head Shape
Possesses a large, bony, and somewhat flattened head with a steep profile. The eyes are prominent and located high on the head.
Body Covering
Unlike most fish with scales, Dactylopterus volitans has a body covered in heavy, bony scutes, giving it a somewhat armored appearance.
Behavior
Observe its movement: it 'walks' on the seabed using its pelvic fins and the lower rays of its pectoral fins, occasionally spreading its large pectoral fins when disturbed or for display.
Habitat
- Tipo di acqua
- saltwater
- Profondità
- Typically found in shallow coastal waters from 1 to 100 meters (3 to 330 feet), but can occasionally be found deeper.
- Ambiente
- Prefers sandy or muddy bottoms, seagrass beds, and open areas near coral reefs. They are benthic and often 'walk' along the substrate using their pelvic fins and the anterior rays of their pectoral fins.
- Areale geografico
- Widespread in tropical and subtropical waters of the Atlantic Ocean, including the Mediterranean Sea, Caribbean Sea, Gulf of Mexico, and along the coasts of Africa and the Americas. Also found in the Indo-Pacific region, though some sources differentiate the Pacific population as Dactylopterus orientalis.
Informazioni sull'acquario
- Livello di cura: advanced
- Temperamento: semi-aggressive
- Dieta: carnivore
- Dimensione minima della vasca: 250 gallons
- Temperatura: 22-26°C (72-79°F)
- Livello di pH: 8.1-8.4
- Durezza: 8-12 dKH
- Compatibilità: Best kept in a species-specific tank or with very large, peaceful tank mates that will not compete for benthic food sources. Avoid small fish or invertebrates as they may be prey.
- Requisiti speciali: Requires a large tank with a soft sand substrate for burrowing and foraging. Live rock structures should be stable and provide hiding places without sharp edges that could damage their delicate fins. Excellent filtration and stable water parameters are crucial. Feeding can be challenging as they prefer live or frozen meaty foods, often needing target feeding.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: No specific seasonality for commercial fishing; present year-round in its range.
- Prezzo di mercato: Low
- Importanza commerciale: low
- Sapore: Mild, white flesh
- Consistenza: Firm
- Metodi di cottura: Frying, Baking, Grilling
- Valore nutrizionale: Good source of protein and omega-3 fatty acids, typical of lean white fish.
Fatti chiave
Not a True Flyerbehavior
Despite its common name 'Flying Gurnard', Dactylopterus volitans does not fly through the air like true flying fish. Its large pectoral fins are used for gliding along the seabed and for display.
Walking Fishbehavior
This fish uses its pelvic fins and the lower, anterior rays of its pectoral fins to 'walk' or 'crawl' across the sandy or muddy seafloor in search of food.
Defensive Displaybehavior
When threatened, the Flying Gurnard will rapidly spread its large, often brightly colored pectoral fins to appear larger and startle potential predators. This display is quite dramatic.
Bony Armorinteresting
Instead of typical scales, its body is covered in a series of heavy, bony plates or scutes, providing a degree of protection against predators.
Auditory Communicationbehavior
Flying Gurnards are known to produce sounds, often described as grunts or clicks, by vibrating their swim bladder. These sounds are thought to be used for communication, especially during courtship or when disturbed.
Informazioni di sicurezza
Maneggiare con cura- Livello di sicurezza: caution
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: While not venomous, Dactylopterus volitans possesses sharp spines on its head and dorsal fins that can inflict painful punctures. Handle with care, especially when attempting to release from fishing gear. Its large pectoral fins are delicate and should not be roughly handled.
Specie simili
Oriental Flying Gurnard
Dactyloptena orientalis
Historically, D. orientalis was considered a synonym or subspecies of D. volitans. Modern taxonomy often recognizes them as distinct species, with D. orientalis primarily found in the Indo-Pacific. Morphological differences are subtle, often involving fin ray counts and specific coloration patterns, but generally, D. volitans is Atlantic/Mediterranean and D. orientalis is Indo-Pacific.
Armored Gurnards
Peristedion spp. (e.g., Peristedion cataphractum)
While also having bony plates and some enlarged fins, true armored gurnards (family Peristediidae) have a more elongated, often reddish body, and typically possess a pair of barbels on the chin. Their pectoral fins, while sometimes large, do not reach the extreme 'wing-like' proportions of Dactylopterus volitans.
True Gurnards
Chelidonichthys spp., Eutrigla spp. (family Triglidae)
True gurnards have a more typical fish body shape, though they also possess large pectoral fins and a bony head. However, their pectoral fins are not as dramatically enlarged or wing-like as those of the Flying Gurnard, and they lack the distinct two-part structure and often vibrant internal coloration. They also have three free, finger-like rays on their pectoral fins, which Dactylopterus volitans lacks.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Scorpaeniformes
- Famiglia
- Dactylopteridae
- Genere
- Dactylopterus
- Specie
- Dactylopterus volitans
Esplora Flying Gurnard
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