arapaima

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Related to pirarucu: Arowana

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.
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References in periodicals archive ?
Also the influence of seasonality on growth of pirarucu developed in captivity as well as the state of wellbeing of the fish was analyzed.
(Parenthetically, I just noticed something rather remarkable, logologically speaking, about that word pirarucu. Does the reader see it too?
Treinamento alimentar de alevinos de pirarucu, (Arapaima gigas, Cuvier, 1829), utilizando atrativos alimentares.
the immune responses and increased the O2 carrying capacity in pirarucu (Andrade et al., 2007).
Legend has it that Pirarucu; the disrespectful and taunting son of an Amazon chief was struck down to the depths of the river by the gods and became an arapaima.
Visiting an early morning fish market, Robson spots an extraordinary variety of unusual fish, including the legendary pirarucu; at 10-foot long it is the largest freshwater fish in the world.
At the early morning fish market, he spots an extraordinary variety of unusual fish, including the legendary pirarucu.
Uso de enzimas digestivas exo' genas na alimentac, ano do pirarucu, Arapaima gigas (Cuvier, 1829).
Previously, it was thought there was one species of arapaima, which also goes by the common names pirarucu or paiche.