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Genyatremus luteus, commonly known as Pescada-dourada or Yellowfin Grunt, is a medium-sized marine fish belonging to the family Haemulidae. It is characterized by its robust body, distinctive coloration, and a prominent mouth. This species is of moderate commercial importance in certain regions and is occasionally encountered by recreational anglers. Its ecological role involves predation on benthic invertebrates, contributing to the trophic dynamics of coastal ecosystems.
Características físicas
- Formato do corpo
- compressed
- Coloração
- The body is generally silvery-grey to yellowish-brown dorsally, fading to silvery-white ventrally. A distinctive feature is the bright yellow coloration on the pectoral, pelvic, and anal fins, and often on the caudal fin. Juveniles may exhibit faint vertical bars or spots that fade with age. The inside of the mouth is typically bright orange or yellow.
- Tipo de escama
- ctenoid
- Posição da boca
- terminal
- Características distintivas
- Bright yellow fins (pectoral, pelvic, anal, and often caudal), Orange or yellow coloration inside the mouth, Large, thick lips, Deeply notched dorsal fin, Robust, compressed body
- Nadadeira dorsal
- Single dorsal fin, deeply notched, with 12-13 spines and 11-13 soft rays. The spinous portion is longer than the soft-rayed portion.
- Nadadeira caudal
- Caudal fin is emarginate to slightly forked.
- Nadadeira peitoral
- Pectoral fins are relatively long and pointed, typically bright yellow.
- Nadadeiras características
- Pelvic and anal fins are also bright yellow. Anal fin has 3 spines and 8-9 soft rays.
Dicas de identificação
Fin Coloration
The most reliable identifier is the vivid yellow coloration of the pectoral, pelvic, and anal fins, and often the caudal fin. This is a key distinguishing feature from other grunt species.
Mouth Interior
The bright orange or yellow color inside the mouth is a unique characteristic for Genyatremus luteus.
Body Shape and Size
A robust, compressed body, typically reaching up to 30-40 cm (12-16 inches) in total length, though larger specimens up to 50 cm (20 inches) have been recorded. The maximum reported weight is around 1.5 kg (3.3 lbs).
Lateral Line
The lateral line is complete and smoothly curved, with 48-52 scales.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found in shallow coastal waters, from nearshore to depths of about 50 meters (164 feet).
- Ambiente
- Inhabits rocky reefs, coral reefs, seagrass beds, and sandy or muddy bottoms, often near structures. Juveniles may be found in estuaries and mangrove areas.
- Distribuição geográfica
- Western Atlantic Ocean, from Florida (USA) and the Gulf of Mexico, throughout the Caribbean Sea, and along the coast of South America down to Brazil.
Informações sobre aquário
- Nível de cuidado: intermediate
- Temperamento: semi-aggressive
- Alimentação: carnivore
- Tamanho mínimo do aquário: 200 gallons
- Temperatura: 24-28°C (75-82°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 8-12 dKH
- Compatibilidade: Can be kept with other similarly sized, semi-aggressive marine fish. Avoid very small or overly aggressive tank mates. Requires ample swimming space and rockwork for shelter.
- Requisitos especiais: Requires a well-established marine aquarium with excellent filtration. Provide a varied diet of meaty foods. Can be sensitive to poor water quality. May exhibit territorial behavior, especially towards conspecifics or similar-looking species.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: No specific pronounced seasonality for fishing, though local regulations and spawning aggregations may influence availability.
- Preço de mercado: Varies regionally, generally moderate.
- Importância comercial: medium
- Sabor: Mild, slightly sweet
- Textura: Flaky, firm white flesh
- Métodos de preparo: Baked, Grilled, Fried, Steamed
- Valor nutricional: Good source of lean protein, omega-3 fatty acids, and essential vitamins and minerals.
Fatos principais
Nocturnal Foragerbehavior
Genyatremus luteus is primarily a nocturnal feeder, emerging from shelters at dusk to forage for benthic invertebrates.
Grunting Soundinteresting
Like other grunts (Haemulidae), Pescada-dourada can produce a 'grunting' sound by grinding its pharyngeal teeth, which is amplified by its swim bladder. This sound is often heard when the fish is stressed or caught.
Dietary Shiftbehavior
Juvenile Pescada-dourada often feed on smaller crustaceans and worms, while adults consume a wider variety of benthic invertebrates, including larger crustaceans, mollusks, and polychaetes.
Habitat Generalistinteresting
This species demonstrates adaptability by inhabiting a wide range of coastal environments, from rocky reefs to mangrove estuaries, showcasing its ecological flexibility.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: No specific handling precautions beyond standard fish handling. The dorsal and anal fin spines can be sharp, so care should be taken to avoid punctures. Not known to be venomous.
Espécies similares
White Grunt
Haemulon plumierii
Lacks the prominent yellow fin coloration and the bright orange/yellow mouth interior. Typically has horizontal stripes or lines on the body, which Genyatremus luteus lacks as an adult.
French Grunt
Haemulon flavolineatum
Distinguished by its yellow horizontal stripes on a silvery body and lacks the bright yellow fins and mouth coloration of Genyatremus luteus.
Tomtate Grunt
Haemulon aurolineatum
Generally smaller, with a more slender body and a distinct dark stripe along the lateral line. Lacks the bright yellow fins and mouth coloration.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Perciformes
- Família
- Haemulidae
- Gênero
- Genyatremus
- Espécie
- luteus
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