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Aspitrigla cuculus, commonly known as the Red Gurnard or Ruivo-escuro in Portuguese, is a demersal fish belonging to the family Triglidae. It is characterized by its distinctive head shape, large pectoral fins, and vibrant coloration. This species is a commercially important fish in many parts of its range, valued for its firm, white flesh.
Características físicas
- Formato do corpo
- elongated
- Coloração
- The dorsal surface is typically reddish-pink to bright red, fading to a paler pink or white on the ventral side. The pectoral fins are often brightly colored, with shades of blue, green, and black spots or bands on the inner surface, though this can vary. Juveniles may have more mottled patterns.
- Tipo de escama
- ctenoid
- Posição da boca
- terminal
- Características distintivas
- Large, bony head with a steep profile and prominent ridges and spines., Two separate dorsal fins., Three free, finger-like rays at the bottom of each pectoral fin, used for 'walking' on the seabed and sensing prey., Large, fan-like pectoral fins.
- Nadadeira dorsal
- Two dorsal fins: the first with 9-11 spines, the second with 18-20 soft rays. The first dorsal fin is typically higher.
- Nadadeira caudal
- Truncate or slightly emarginate caudal fin.
- Nadadeira peitoral
- Large, fan-shaped pectoral fins with 10-11 rays, plus three free, detached rays below.
- Nadadeiras características
- Pelvic fins are thoracic, located beneath the pectoral fins.
Dicas de identificação
Coloration
Look for the characteristic reddish-pink to bright red body color, especially on the back and sides.
Head Spines and Ridges
Observe the prominent bony plates, ridges, and spines on the large head, which are characteristic of gurnards.
Pectoral Fins
Note the large, fan-like pectoral fins and, crucially, the three free, detached rays at the bottom of each pectoral fin. These rays are used for locomotion and sensing.
Dorsal Fins
Identify the two distinct dorsal fins, with the first being spiny and generally taller than the second soft-rayed fin.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found at depths ranging from 20 to 250 meters, though occasionally encountered in shallower or deeper waters (up to 300 meters).
- Ambiente
- Demersal, inhabiting sandy, muddy, or gravelly bottoms. Prefers soft substrates where it can partially bury itself.
- Distribuição geográfica
- Eastern Atlantic Ocean, from Norway and the British Isles south to Mauritania, including the Mediterranean Sea and the Black Sea. Also found around the Azores and Madeira.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: semi-aggressive
- Alimentação: carnivore
- Tamanho mínimo do aquário: 500 gallons
- Temperatura: 10-20°C (50-68°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 1.020-1.025 SG
- Compatibilidade: Not suitable for typical home aquariums due to size, specialized diet, and specific environmental needs. May be kept in large public aquariums with other large, robust marine species.
- Requisitos especiais: Requires a very large, well-filtered coldwater marine aquarium with a soft substrate for burrowing. Live food (crustaceans, small fish) is essential. Not commonly kept in captivity due to its specific needs and size.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Typically caught year-round, with peak seasons varying by region, often more abundant in cooler months.
- Preço de mercado: Varies significantly by region and season, generally considered a moderately priced food fish.
- Importância comercial: medium
- Sabor: Mild, sweet, and delicate flavor.
- Textura: Firm, flaky, and white flesh.
- Métodos de preparo: Baked, Grilled, Fried, Steamed, Used in soups and stews
- Valor nutricional: Good source of lean protein, omega-3 fatty acids, and various vitamins and minerals.
Fatos principais
Walking Fishbehavior
The three free rays on the pectoral fins of the Red Gurnard are highly specialized. They are used not only for 'walking' along the seabed in search of food but also contain chemoreceptors, allowing the fish to 'taste' the substrate for hidden prey.
Sound Productionbehavior
Like other gurnards, Aspitrigla cuculus can produce grunting or croaking sounds, particularly when disturbed or during spawning. These sounds are generated by vibrating muscles against the swim bladder.
Dietary Habitsbehavior
The Red Gurnard is an opportunistic predator, primarily feeding on benthic invertebrates such as crustaceans (shrimps, crabs), polychaetes, and small fish. Its sensory pectoral fin rays are crucial for locating prey buried in the sediment.
Taxonomic Historyevolution
The genus Aspitrigla was formerly considered a subgenus of Chelidonichthys, but it is now recognized as a distinct genus. This highlights ongoing refinements in fish taxonomy based on genetic and morphological studies.
Informações de segurança
Manusear com cuidado- Nível de segurança: caution
- Venenoso: Sim
- Comestibilidade: edible
- Observações de manuseio: Gurnards possess sharp spines on their head (preopercular and opercular spines) and in their dorsal fins. These spines can inflict painful wounds. While not typically considered highly venomous, some species of gurnards, including Aspitrigla cuculus, have been reported to have mildly venomous dorsal fin spines that can cause localized pain, swelling, and discomfort. Handle with care, using gloves or a towel to avoid direct contact with spines. If stung, clean the wound thoroughly and apply heat (e.g., hot water) to denature any potential venom.
Espécies similares
Grey Gurnard
Eutrigla gurnardus
Generally greyish-brown coloration, often with darker spots or blotches. The first dorsal fin usually has a distinct black spot. The head is less spiny than Aspitrigla cuculus.
Tub Gurnard
Chelidonichthys lucerna
Often larger and more robust. While also reddish, it typically has a more pronounced blue-green spot on the pectoral fin with a white margin. The head profile is generally less steep and less spiny than Aspitrigla cuculus.
Streaked Gurnard
Trigloporus lastoviza
Characterized by distinct dark, horizontal streaks or bands along its flanks. The pectoral fins are typically smaller and less brightly colored than Aspitrigla cuculus.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Scorpaeniformes
- Família
- Triglidae
- Gênero
- Aspitrigla
- Espécie
- Aspitrigla cuculus
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