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Lepidocybium flavobrunneum, commonly known as Escolar, is a species of scombrid fish belonging to the family Gempylidae. It is a large, predatory, deep-water fish characterized by its dark coloration and a high oil content, particularly wax esters, which can have significant physiological effects on human consumption. It is a commercially important species, often mislabeled as other fish, and is known for its firm, white flesh.
Características físicas
- Formato do corpo
- torpedo
- Coloração
- Uniformly dark brown to black dorsally, fading to a slightly lighter brown or grey ventrally. Fins are typically dark.
- Tipo de escama
- cycloid
- Posição da boca
- terminal
- Características distintivas
- Large, prominent eyes adapted for deep-water vision., Strong, sharp teeth in both jaws., Two widely separated dorsal fins., A series of finlets (4-6) behind the second dorsal and anal fins., A prominent lateral keel on the caudal peduncle, flanked by two smaller keels.
- Nadadeira dorsal
- First dorsal fin with 26-32 spines; second dorsal fin with 17-19 soft rays, followed by 4-6 finlets. The first dorsal fin is much longer and higher than the second.
- Nadadeira caudal
- Strongly forked caudal fin, characteristic of fast-swimming pelagic fish.
- Nadadeira peitoral
- Relatively short and rounded pectoral fins.
- Nadadeiras características
- Pelvic fins are small and located directly below the pectoral fins. Anal fin has 12-14 soft rays, followed by 4-6 finlets, mirroring the second dorsal fin.
Dicas de identificação
Coloration
Its uniformly dark brown to black body is a key identifier, distinguishing it from lighter-colored scombrids.
Finlets
The presence of 4-6 finlets behind both the second dorsal and anal fins is characteristic of this species and other gempylids.
Lateral Keels
The prominent central keel on the caudal peduncle, flanked by two smaller keels, is a definitive morphological feature.
Teeth
Its strong, sharp teeth are indicative of its predatory nature and can be observed upon closer inspection of the mouth.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found in mesopelagic and bathypelagic zones, ranging from 200 to 900 meters (650 to 3,000 feet), but can be found shallower at night.
- Ambiente
- Oceanic, pelagic, preferring deep offshore waters over continental slopes and abyssal plains.
- Distribuição geográfica
- Circumglobal in tropical and temperate waters of the Atlantic, Pacific, and Indian Oceans. Absent from the eastern Pacific off Central and South America.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: aggressive
- Alimentação: carnivore
- Tamanho mínimo do aquário: Not suitable for home aquaria due to its large size, deep-water habitat, and specialized needs.
- Temperatura: Not applicable for aquaria
- Nível de pH: Not applicable for aquaria
- Dureza da água: Not applicable for aquaria
- Compatibilidade: Not applicable for aquaria
- Requisitos especiais: Requires vast, deep-water environments with specific pressure and temperature gradients, making it unsuitable for captivity.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Available year-round, but fishing efforts and availability may vary regionally based on migratory patterns and fishing regulations.
- Preço de mercado: Varies significantly by region and market, often sold at a premium due to its texture and flavor, but can be discounted due to its laxative effects.
- Importância comercial: medium
- Sabor: Rich, buttery, and savory, often compared to swordfish or tuna.
- Textura: Firm, flaky, and moist with a high fat content.
- Métodos de preparo: Grilling, Baking, Broiling, Smoking, Pan-frying
- Valor nutricional: High in protein and omega-3 fatty acids. However, its high content of indigestible wax esters (gempylotoxin) can cause gastrointestinal distress (keriorrhea) in some individuals, especially when consumed in large quantities. It is recommended to consume in small portions.
Fatos principais
Wax Ester Contentinteresting
Escolar is famous (or infamous) for its high content of wax esters, which are indigestible by humans and can cause gastrointestinal issues if consumed in large quantities. This is why it's sometimes called 'Castor Oil Fish'.
Deep-Sea Predatorbehavior
This fish is a formidable predator in the deep-sea environment, using its large eyes and sharp teeth to hunt squid, crustaceans, and other fish in dimly lit waters.
Mislabeling Issuesinteresting
Due to its similar appearance and texture to more expensive fish like tuna or swordfish, Escolar has been frequently mislabeled in the seafood industry, leading to consumer confusion and unexpected digestive side effects.
Global Distributioninteresting
Escolar has a wide circumglobal distribution, inhabiting tropical and temperate waters across all major oceans, showcasing its adaptability to various oceanic conditions.
Informações de segurança
Manusear com cuidado- Nível de segurança: caution
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: While not venomous, Escolar has sharp teeth and should be handled with care to avoid cuts. The primary safety concern relates to its consumption. Due to its high content of indigestible wax esters (gempylotoxin), consumption can lead to keriorrhea (oily, orange-colored diarrhea) in sensitive individuals or when consumed in large quantities. It is recommended to consume small portions, especially during the first tasting, and to avoid it if you have a sensitive digestive system or are pregnant.
Espécies similares
Oilfish
Ruvettus pretiosus
Ruvettus pretiosus (Oilfish) has a rougher skin texture due to large, bony scales, and a more compressed body. Escolar (Lepidocybium flavobrunneum) has smoother skin and a more torpedo-shaped body. Both contain wax esters, but Ruvettus pretiosus is generally considered to have a higher concentration and more potent laxative effect.
Snake Mackerel
Gempylus serpens
Gempylus serpens (Snake Mackerel) has a much more elongated, snake-like body and a more pronounced, pointed snout. Escolar is more robust and tuna-like in body shape.
Wahoo
Acanthocybium solandri
Acanthocybium solandri (Wahoo) has a distinct iridescent blue-green coloration with vertical bars, a much longer snout, and lacks the high wax ester content of Escolar. Its flesh is also typically lighter in color.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Scombriformes
- Família
- Gempylidae
- Gênero
- Lepidocybium
- Espécie
- flavobrunneum
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