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The Silver Arowana (Osteoglossum bicirrhosum) is a large, predatory freshwater fish native to the Amazon, Essequibo, and Oyapock basins in South America. It is characterized by its elongated, compressed body, large scales, and distinctive upturned mouth with two prominent barbels. Known for its powerful leaps out of the water to catch prey, it is a highly sought-after species in the aquarium trade and a significant food fish in its native range.
Ciri Fisik
- Bentuk tubuh
- elongated
- Warna
- Silvery-white to metallic silver, sometimes with a faint pinkish or bluish sheen, especially on the scales. Juveniles may have a yellowish tint. The fins are typically translucent or slightly dusky.
- Jenis sisik
- ganoid
- Posisi mulut
- superior
- Ciri khas
- Large, prominent scales that give a 'plated' appearance., Upturned mouth (superior mouth) adapted for surface feeding., Two prominent barbels at the tip of the lower jaw., Large eyes., Long, flowing dorsal and anal fins that extend almost to the caudal fin.
- Sirip punggung
- Long and low, originating far back on the body, almost confluent with the caudal fin.
- Sirip ekor
- Rounded to slightly truncated, often appearing fan-like.
- Sirip dada
- Relatively small and rounded.
- Sirip khas
- Dorsal and anal fins are very long and nearly mirror images of each other, extending posteriorly to meet the caudal fin base, giving a continuous appearance.
Tips Identifikasi
Body Shape and Coloration
Look for the long, slender, and laterally compressed body with a distinct metallic silver coloration. The large, reflective scales are a key identifier.
Mouth and Barbels
The strongly upturned mouth, designed for surface feeding, and the two prominent barbels on the lower jaw are unmistakable features.
Fin Structure
The elongated dorsal and anal fins that extend almost to the caudal fin, giving a continuous appearance, are characteristic.
Scale Size
The scales are notably large and distinct, often with a reticulated pattern.
Habitat
- Jenis air
- freshwater
- Kedalaman
- Typically found in surface waters, especially in calm, slow-moving areas.
- Lingkungan
- Prefers blackwater and clearwater rivers, floodplains, oxbow lakes, and flooded forests. Often found among submerged vegetation, roots, and overhanging branches, which provide cover and hunting grounds.
- Sebaran geografis
- Native to the Amazon River basin, Essequibo River basin, and Oyapock River basin in South America, encompassing parts of Brazil, Peru, Ecuador, Colombia, Venezuela, Guyana, Suriname, and French Guiana.
Informasi Akuarium
- Tingkat perawatan: advanced
- Temperamen: semi-aggressive
- Pola makan: carnivore
- Ukuran akuarium minimum: 250 gallons (946 liters) for a single adult, larger for multiple or mixed species
- Suhu: 75-82°F (24-28°C)
- Tingkat pH: 6.0-7.5
- Kesadahan: 2-15 dGH
- Kompatibilitas: Best kept alone or with other large, robust, and fast-moving fish that cannot be swallowed. Avoid small or slow-moving tank mates. Can be aggressive towards conspecifics unless kept in very large groups in extremely spacious aquariums.
- Kebutuhan khusus: Requires a very large aquarium with a tight-fitting lid due to its jumping ability. Excellent filtration is essential due to its large size and carnivorous diet. Provide open swimming space with some floating or tall, sturdy submerged vegetation for cover. Substrate preference is not critical, but fine sand or smooth gravel is suitable. Dim lighting is often preferred.
Informasi di Alam Liar
- Status konservasi: least concern
- Musim: Spawning typically occurs during the wet season (December to March) when floodwaters are high, providing ample food and cover for fry.
- Harga pasar: Varies widely based on size and origin, from $50 to several hundred dollars for juveniles/sub-adults.
- Nilai ekonomis: high
- Rasa: Mild, white flesh
- Tekstur: Flaky, firm
- Metode memasak: Grilled, Fried, Baked, Stewed
- Nilai gizi: Good source of protein and omega-3 fatty acids.
Fakta kunci
Living Fossilevolution
Arowanas belong to the ancient family Osteoglossidae, often referred to as 'living fossils' due to their primitive characteristics that have remained largely unchanged for millions of years.
Surface Hunterbehavior
The Silver Arowana is renowned for its ability to leap out of the water to catch insects, small birds, and other terrestrial animals from overhanging branches, earning it the nickname 'water monkey'.
Mouthbrooderbehavior
Male Silver Arowanas are dedicated mouthbrooders, carrying the eggs and fry in their mouths for an extended period (up to 50-60 days) until the young are large enough to be independent.
Impressive Sizerecord
Silver Arowanas can grow to impressive sizes, reaching up to 1 meter (3.3 feet) in length and weighing several kilograms, making them one of the largest freshwater aquarium fish.
Cultural Significanceinteresting
While not as culturally significant as the Asian Arowana, the Silver Arowana is still admired for its beauty and predatory prowess, often seen as a symbol of power and prosperity in some cultures.
Informasi keamanan
Tangani dengan hati-hati- Tingkat keamanan: caution
- Berbisa: Tidak
- Kelayakan konsumsi: edible
- Catatan penanganan: Silver Arowanas are powerful fish with strong jaws and can inflict a painful bite if handled carelessly. Their large scales can also be sharp. When handling, use appropriate tools and exercise caution to avoid injury to both the fish and handler. They are also prone to jumping, so care must be taken during transfers or tank maintenance.
Spesies serupa
Black Arowana
Osteoglossum ferreirai
Distinguished by its darker, often blackish or dark grey coloration, especially as a juvenile, and a more pointed snout. Adults retain a darker hue compared to the silvery O. bicirrhosum. Juveniles of O. ferreirai have a prominent black lateral stripe that fades with age, which is absent in O. bicirrhosum.
Asian Arowana
Scleropages formosus (and other Scleropages species)
Asian Arowanas have much larger, more iridescent scales with distinct patterns (e.g., gold, red, green). Their body shape is generally deeper and less elongated than the Silver Arowana. They also possess barbels, but their overall appearance, especially coloration and scale texture, is distinctly different. Asian Arowanas are also geographically distinct, found in Southeast Asia.
African Arowana
Heterotis niloticus
While also an arowana relative, the African Arowana has a much smaller mouth, lacks barbels, and has a more subdued, brownish-grey coloration. Its scales are also smaller and less prominent than those of Osteoglossum species. It is a filter feeder, unlike the predatory Osteoglossum.
Klasifikasi ilmiah
- Kerajaan
- Animalia
- Filum
- Chordata
- Kelas
- Actinopterygii
- Ordo
- Osteoglossiformes
- Famili
- Osteoglossidae
- Genus
- Osteoglossum
- Spesies
- bicirrhosum
Jelajahi Silver Arowana
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