Arapaima

Descrição

Arapaima gigas is one of the largest freshwater fish in the world, characterized by its elongated, torpedo-shaped body, large scales, and distinctive reddish-orange coloration on its posterior flanks and tail. It possesses a unique labyrinth organ, allowing it to breathe atmospheric air, a crucial adaptation for its oxygen-poor Amazonian habitats. This obligate air-breather surfaces regularly to gulp air.

Características físicas

Formato do corpo

torpedo

Coloração

Dorsally dark, ranging from greenish-brown to black, fading to lighter shades ventrally. The most striking feature is the reddish-orange pigmentation on the posterior flanks, caudal peduncle, and caudal fin, which intensifies with age and size. Scales are large and iridescent.

Tipo de escama

ganoid

Posição da boca

superior

Características distintivas

Large, bony, ganoid-like scales (though technically cycloid with a ganoid-like outer layer) that are extremely tough and provide armor-like protection., Obligate air-breather, possessing a modified swim bladder that functions as a lung, requiring it to surface every 5-20 minutes., Large, bony, flattened head with a wide, upturned mouth., Prominent reddish-orange coloration on the posterior body and tail., Relatively small, deeply set eyes.

Nadadeira dorsal

Long and set far back on the body, almost opposite the anal fin.

Nadadeira caudal

Rounded and powerful, often with a distinct reddish-orange margin.

Nadadeira peitoral

Relatively small and positioned low on the body.

Nadadeiras características

Pelvic fins are abdominal. All fins are generally dark, contrasting with the body coloration, especially the caudal fin's red hue.

Dicas de identificação

Habitat

Tipo de água

freshwater

Profundidade

Typically found in shallow, slow-moving waters, often near the surface, especially in oxygen-depleted environments. Can inhabit depths up to several meters.

Ambiente

Prefers oxbow lakes, flooded forests, swamps, and slow-moving sections of large rivers (e.g., Amazon and Essequibo basins). Thrives in areas with dense aquatic vegetation and submerged wood, which provide cover and hunting grounds. Tolerant of low oxygen conditions due to its air-breathing ability.

Distribuição geográfica

Native to the Amazon River basin in South America, including parts of Brazil, Peru, Ecuador, Colombia, Guyana, and Bolivia. Introduced to other regions for aquaculture and sport fishing.

Informações sobre aquário

• Nível de cuidado: expert
• Temperamento: aggressive
• Alimentação: carnivore
• Tamanho mínimo do aquário: Not suitable for typical home aquariums; requires massive, custom-built public aquarium exhibits (tens of thousands of gallons).
• Temperatura: 24-29°C (75-84°F)
• Nível de pH: 6.0-7.5
• Dureza da água: 5-15 dGH
• Compatibilidade: Generally kept alone or with other very large, robust fish that cannot be swallowed. Highly predatory.
• Requisitos especiais: Requires extremely large tanks, excellent filtration, and a diet of large, high-quality protein. Must have access to the surface for air breathing. Rapid growth rate necessitates continuous upgrades in housing.

Informações no ambiente natural

• Estado de conservação: endangered
• Sazonalidade: Spawning typically occurs during the low-water season (December-May), with parental care extending into the rising water season. Feeding activity is high during the wet season when prey is abundant.
• Preço de mercado: Highly variable, but historically a valuable food fish. Farmed Arapaima can fetch significant prices.
• Importância comercial: high
• Sabor: Mild, firm, white flesh, often compared to cod or halibut.
• Textura: Flaky, firm, and boneless.
• Métodos de preparo: Grilled, Baked, Fried, Steamed
• Valor nutricional: High in protein, low in fat, and rich in Omega-3 fatty acids.

Fatos principais

Espécies similares

Classificação científica

Reino

Animalia

Filo

Chordata

Classe

Actinopterygii

Ordem

Osteoglossiformes

Família

Arapaimidae

Gênero

Arapaima

Espécie

Arapaima gigas

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