arapaima

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arapaima

(ăr'əpī`mə), tropical fish, genus Arapaima, of the Amazon basin. Arapaimas are perhaps the largest of the strictly freshwater fishes, reportedly reaching a length of 15 ft (4.5 m), but averaging 7 to 8 ft (2–2.4 m) in length and 200 lb (90 kg) in weight. The dorsal and anal fins of the arapaimas are placed so far back that they appear to be part of the tail fin, giving a massive appearance to the posterior region. The scales are olive-green, turning increasingly reddish in the tail region and becoming crimson near the tail fin. The swim bladderswim bladder,
large, thin-walled sac in some fishes that may function in several ways, e.g., as a buoyant float, a sound producer and receptor, and a respiratory organ. The swim bladder, or air bladder, is located in the dorsal portion of the body cavity and is filled with gases.
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 is open to the pharynx; it is rich in blood vessels and serves as a lung. Arapaimas use the fins to hollow out a nest in clear, shallow, sandy-bottomed areas. They are graceful swimmers despite their bulk, and they are valued as an aquarium fish as well as for food. Arapaimas are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Osteoglossiformes, family Arapaimidae.
References in periodicals archive ?
Parasitic infections in pirarucu fry, Arapaima gigas Schinz, 1822 (Arapaimatidae) kept in a semi-intensive fish farm in Central Amazon, Brazil.
The influence of dietary vitamin C and E supplementation on the physiological response of pirarucu, Arapaima gigas, in net culture.
El paiche Arapaima gigas es uno de los dos peces mas grandes de America del Sur, pudiendo llegar a medir mas de 2 m de longitud y pesar mas de 100 kg.
So, until further field surveys of appropriate areas are completed, we will not know if Arapaima gigas is extinct or still swimming about," he added.
Arapaima gigas (Osteoglossiformes: Osteoglossidae), conocido como paiche o pirarucu, es una especie endemica de la cuenca del Amazonas y esta incluida en el Apendice II-B de la Convencion sobre el Comercio Internacional de Especies Amenazadas (CITES) (Casares et al.
Arapaima gigas ("paiche") es uno de los dos peces mas grandes de America del Sur, pudiendo llegar a medir mas de 2 m de longitud y pesar mas de 100 kg.
HAEMATOLOGICAL VALUES OF PAICHE ARAPAIMA GIGAS IN THE PERUVIAN AMAZONIA
2004), tanto para el consumo humano como para forraje vivo en cultivo de Arapaima gigas (Alcantara y Guerra, 1992; Alcantara et al.