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Megalops atlanticus, commonly known as the Tarpon, is a large, predatory marine and estuarine fish renowned for its impressive size, acrobatic fighting style when hooked, and distinctive silvery appearance. It is a highly sought-after game fish, particularly in the southeastern United States, Caribbean, and parts of Central and South America. Tarpon are characterized by their large scales, upturned mouth, and a dorsal fin with an elongated last ray. They possess a unique swim bladder that functions as a primitive lung, allowing them to gulp air at the surface, which enables them to survive in oxygen-depleted waters.
Características físicas
- Formato do corpo
- torpedo
- Coloração
- Silvery flanks and belly, with a dark blue to greenish-black dorsal surface. The large scales often have a reflective, iridescent quality.
- Tipo de escama
- cycloid
- Posição da boca
- superior
- Características distintivas
- Large, prominent scales (cycloid type, up to 6 cm in diameter), Large, upturned mouth with a protruding lower jaw, Large eyes, Elongated last ray of the dorsal fin, extending almost to the caudal fin, Forked caudal fin, Ability to gulp air at the surface
- Nadadeira dorsal
- Single dorsal fin, located mid-body, with 10-13 soft rays; the last ray is greatly elongated and filamentous.
- Nadadeira caudal
- Deeply forked caudal fin, powerful and symmetrical.
- Nadadeira peitoral
- Relatively small, low-set pectoral fins.
- Nadadeiras características
- Pelvic fins are abdominal, located well behind the pectoral fins. Anal fin is similar in shape to the dorsal fin but smaller, with 22-25 soft rays.
Dicas de identificação
Size and Shape
Large, elongated, and compressed body, reaching up to 2.5 meters (8.2 feet) in length and over 160 kg (350 lbs) in weight.
Scales
Very large, silvery, and reflective scales, often described as 'armor-plated'.
Mouth
Distinctive large, upturned mouth with a prominent lower jaw, giving it a 'snub-nosed' appearance.
Dorsal Fin
The last ray of the dorsal fin is greatly elongated, forming a distinctive filament that can extend almost to the tail.
Coloration
Brilliant silver sides and belly, with a darker, often bluish-green or grayish-black back.
Habitat
- Tipo de água
- brackish
- Profundidade
- Typically found in shallow coastal waters, estuaries, lagoons, mangrove-lined creeks, and rivers, but also offshore for spawning. Generally from surface to 30 meters (100 feet).
- Ambiente
- Prefers warm, tropical, and subtropical waters. Tolerant of a wide range of salinities, from hypersaline lagoons to freshwater rivers, due to its air-breathing capability. Often found near structure such as bridges, jetties, and channels.
- Distribuição geográfica
- Western Atlantic Ocean, from Nova Scotia (rarely) south to Argentina, including the Gulf of Mexico and the Caribbean Sea. Also found along the coast of West Africa, from Senegal to Angola.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: aggressive
- Alimentação: carnivore
- Tamanho mínimo do aquário: Not suitable for home aquaria; requires massive public aquarium facilities due to size and activity.
- Temperatura: 22-28°C (72-82°F)
- Nível de pH: 7.5-8.5
- Dureza da água: 10-25 dGH
- Compatibilidade: Only with very large, robust fish of similar size in extremely large, specialized exhibits. Not suitable for community tanks.
- Requisitos especiais: Requires immense space, excellent filtration, and a constant supply of live or fresh dead fish as food. Not recommended for private aquarists.
Informações no ambiente natural
- Estado de conservação: vulnerable
- Sazonalidade: Spawning typically occurs offshore from late spring to early autumn. Migratory patterns are influenced by water temperature and food availability, with peak fishing seasons varying geographically (e.g., Florida Keys in spring/early summer, Central America in winter/spring).
- Preço de mercado: Primarily a sport fish; commercial harvest is generally prohibited or highly restricted. Value is in recreational tourism.
- Importância comercial: low
- Sabor: Generally considered poor due to strong, 'muddy' flavor and numerous small bones.
- Textura: Flaky, but often described as mushy.
- Métodos de preparo: Not typically consumed; catch and release is standard practice.
- Valor nutricional: Not commonly eaten, so nutritional value is not a primary consideration. Contains protein and omega-3 fatty acids like most fish, but palatability is low.
Fatos principais
Air-Breathing Abilitybehavior
Tarpon possess a modified swim bladder that functions as a primitive lung, allowing them to gulp air at the surface. This adaptation enables them to survive in oxygen-poor waters where other fish cannot.
Leaping Acrobatsbehavior
When hooked, Tarpon are famous for their spectacular aerial displays, leaping high out of the water in an attempt to dislodge the hook. This makes them a highly prized sport fish.
Long-Lived Giantsrecord
Tarpon are long-lived fish, with individuals known to live over 50 years in the wild. Their slow growth and late maturity contribute to their vulnerability.
Larval Stageevolution
Tarpon undergo a leptocephalus larval stage, a transparent, ribbon-like larva similar to that of eels, which is unique among non-eel species.
Migratory Patternsbehavior
Tarpon undertake extensive migrations, often traveling hundreds or even thousands of kilometers along coastlines, driven by spawning cycles and food availability.
Informações de segurança
Manusear com cuidado- Nível de segurança: caution
- Venenoso: Não
- Comestibilidade: not recommended
- Observações de manuseio: Tarpon are powerful fish and can cause injury with their thrashing when caught. Their gill plates are sharp. Anglers should exercise caution when handling, especially during release. Due to their conservation status and poor culinary quality, catch and release is strongly encouraged and often legally mandated. Minimize out-of-water time for photography and ensure proper support of the fish's body.
Espécies similares
Ladyfish
Elops saurus
Ladyfish are much smaller (typically under 1 meter), have smaller scales, and lack the elongated dorsal fin ray characteristic of tarpon. Their body is more slender.
Oxeye Tarpon
Megalops cyprinoides
The Oxeye Tarpon (Indo-Pacific Tarpon) is a distinct species found in the Indo-Pacific. While morphologically similar, it is generally smaller than M. atlanticus and has a different geographic distribution. The elongated dorsal fin ray is also present in M. cyprinoides, but M. atlanticus typically reaches much larger sizes.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Elopiformes
- Família
- Megalopidae
- Gênero
- Megalops
- Espécie
- Megalops atlanticus
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