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Helicolenus dactylopterus, commonly known as the Blackbelly Rosefish or Boca Negra, is a demersal marine fish belonging to the family Sebastidae (scorpionfishes and rockfishes). It is characterized by its robust body, large head, and distinctive coloration. This species is a commercially important fish in many parts of its range, targeted by both artisanal and industrial fisheries. It is a relatively long-lived species, reaching considerable sizes and inhabiting a wide range of depths.
Características físicas
- Formato do corpo
- compressed
- Coloração
- Variable, typically reddish-orange to pinkish-red dorsally, fading to a lighter pink or white ventrally. Often exhibits irregular dark blotches or bands on the body and fins. The inside of the mouth and gill cavity are distinctly dark, often bluish-black, giving rise to the common name 'Boca Negra' (black mouth) or 'Bluemouth Rockfish'.
- Tipo de escama
- ctenoid
- Posição da boca
- terminal
- Características distintivas
- Large head with prominent eyes., Robust, compressed body., Distinctive dark (bluish-black) coloration inside the mouth and gill cavity., Presence of venomous spines in the dorsal, anal, and pelvic fins., A bony ridge below the eye (suborbital stay) with several spines.
- Nadadeira dorsal
- Single, long dorsal fin with 11-13 strong, venomous spines followed by 10-14 soft rays. A deep notch often separates the spinous and soft-rayed portions.
- Nadadeira caudal
- Truncate to slightly emarginate caudal fin.
- Nadadeira peitoral
- Large, fan-like pectoral fins with 17-20 rays, often reaching beyond the anus.
- Nadadeiras características
- Pelvic fins with 1 spine and 5 soft rays, located thoracically. Anal fin with 3 strong, venomous spines and 5-7 soft rays.
Dicas de identificação
Mouth Coloration
The most definitive feature is the dark, often bluish-black, coloration inside the mouth and gill cavity. This is unique among similar species in its range.
Body Shape and Color
Robust, compressed body with reddish-orange to pinkish-red coloration, often with irregular dark blotches. This general appearance is typical of many rockfishes, but combined with other features, aids identification.
Spines
Count the dorsal fin spines (11-13) and anal fin spines (3). Note the presence of a suborbital stay with spines below the eye.
Pectoral Fin Length
The pectoral fins are relatively long, often extending past the anus.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found at depths ranging from 50 to 1000 meters (164 to 3280 feet), with juveniles often found in shallower waters (around 50-100m) and adults preferring deeper habitats.
- Ambiente
- Demersal, inhabiting rocky bottoms, coral reefs, seamounts, and continental shelves and slopes. Prefers areas with complex topography that provide shelter and ambush opportunities.
- Distribuição geográfica
- Widely distributed in the Atlantic Ocean. In the Eastern Atlantic, it ranges from Norway and Iceland south to Angola, including the Mediterranean Sea, Azores, Madeira, and Canary Islands. In the Western Atlantic, it is found from Nova Scotia, Canada, south to Venezuela, including the Gulf of Mexico and the Caribbean Sea.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: aggressive
- Alimentação: carnivore
- Tamanho mínimo do aquário: 500 gallons
- Temperatura: 10-18°C (50-64°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 8-12 dKH
- Compatibilidade: Not suitable for typical community aquariums. Best kept in a species-specific tank or with very large, robust, and non-aggressive fish that cannot be consumed. Avoid small fish, crustaceans, and invertebrates.
- Requisitos especiais: Requires a very large, cold-water marine aquarium with excellent filtration and strong water movement. Plenty of rockwork for hiding and ambush points is essential. Due to its venomous spines, extreme caution is required during handling and tank maintenance. Not commonly kept in home aquariums due to size, temperature requirements, and venom.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Available year-round, but fishing effort and catch rates may vary seasonally due to weather conditions and spawning aggregations.
- Preço de mercado: Varies significantly by region and market demand, often considered a premium food fish.
- Importância comercial: high
- Sabor: Mild, sweet, and delicate flavor.
- Textura: Flaky, firm, and moist white flesh.
- Métodos de preparo: Baking, Grilling, Frying, Steaming, Poaching
- Valor nutricional: Good source of lean protein, omega-3 fatty acids, and various vitamins and minerals.
Fatos principais
Deep-Sea Dwellerbehavior
Helicolenus dactylopterus is a true deep-sea inhabitant, commonly found at depths where light penetration is minimal, relying on its large eyes to navigate and hunt.
Venomous Defensebehavior
Like many scorpionfishes, the Boca Negra uses venomous spines as a primary defense mechanism against predators, delivering a painful sting if threatened.
Long Lifespanbehavior
This species is known to be relatively long-lived, with individuals potentially reaching ages of over 40 years, contributing to its vulnerability to overfishing.
Ambush Predatorbehavior
Helicolenus dactylopterus is an ambush predator, often camouflaging itself among rocky substrates to surprise its prey, which includes a variety of crustaceans and smaller fish.
Distinctive Mouthinteresting
The common name 'Boca Negra' (black mouth) directly refers to the unique dark coloration inside its mouth and gill cavity, a key identification feature.
Informações de segurança
Venenoso- Nível de segurança: venomous
- Venenoso: Sim
- Comestibilidade: edible
- Observações de manuseio: Helicolenus dactylopterus possesses venomous spines in its dorsal, anal, and pelvic fins. Punctures from these spines can cause immediate and intense pain, swelling, redness, and in some cases, nausea, dizziness, and muscle weakness. The venom is protein-based and heat-labile. When handling, extreme caution is advised. Use thick gloves and avoid direct contact with the spines. If stung, immerse the affected area in hot water (as hot as can be tolerated without scalding, typically 45-50°C or 113-122°F) for 30-90 minutes to denature the venom. Seek medical attention if symptoms are severe or persist.
Espécies similares
Redfish
Sebastes marinus (formerly Sebastes norvegicus)
Sebastes marinus typically has a more uniformly red coloration and lacks the distinct dark mouth coloration of Helicolenus dactylopterus. The head profile and spine arrangement can also differ upon close inspection.
Acadian Redfish
Sebastes fasciatus
Similar in general appearance and habitat, but Sebastes fasciatus also lacks the dark mouth coloration. Morphological differences in head spination and fin ray counts can distinguish them, though these require careful examination.
Other Rockfishes (Sebastes spp.)
Various Sebastes species
Many species within the genus Sebastes share a similar body plan and reddish coloration. The key distinguishing feature for Helicolenus dactylopterus remains the dark coloration of the mouth and gill cavity, which is absent in Sebastes species.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Scorpaeniformes
- Família
- Sebastidae
- Gênero
- Helicolenus
- Espécie
- dactylopterus
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