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A large South American freshwater food fish (Arapaima gigas) that can attain a length of up to 3 meters (10 feet). Also called pirarucu.

[American Spanish or Portuguese, both probably of Tupian origin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Animals) a very large primitive freshwater teleost fish, Arapaima gigas, that occurs in tropical South America and can attain a length of 4.5 m (15 ft) and a weight of 200 kg (440 lbs): family Osteoglossidae
[via Portuguese from Tupi]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Photos of the dead seven-foot long arapaima, weighing some 108kg, have since circulated on local social media.
Henneguya aequidens occurred in 33.3% of the gills of Aequidens plagiozonatus individuals (VIDEIRA et al., 2015); whereas in Arapaima gigas, Henneguya arapaima parasitized the gill arches and gall bladder with a prevalence of 11.7% and 82.3%, respectively (FEIJO et al., 2008).
Pirarucu Arapaima gigas (Osteoglossomorpha: Osteoglossidae) is a large carnivorous fish species of high commercial value and great aquaculture potential in the Amazon region.
In the case of another overexploited fish species--the enormous, air-breathing pirarucu (Arapaima gigas)--scientists formed alliances with local people to create protected areas and management plans, preserving both fish stocks and the income of the fishermen.
FA: I'd like to say arapaima, or something really exotic--but the best I can do is a jaguar guapote or Mozambique tilapia.
Discover one of the world's largest freshwater fish, the arapaima, and the wide-eyed kinkajou.
(23.) Kristia Harris, Michael McGarvey, Michael Nayak, Bogdan Udrea et al., "Application for RSO Automated Proximity Analysis and IMAging (ARAPAIMA): Development of a Nanosat-based Space Situational Awareness Mission", SSC Paper 13-VI, 2009, /all2013/40/, 1-19; Bogdan Udrea, Michael Nayak, Michaella Ryle et al., "Mission Design and Concept of Operations of a 6U CubeSat Mission for Proximity Operations and RSO Imaging" (paper presented at the Fifth International Conference on Spacecraft Formation Flying Missions and Technologies, Munich, Germany, 2013), 1-15; Francisco J.
"In the close margins, there appeared to be quite a lot of activity from predatory fish, including some big Arapaima, which made me feel the Siamese carp would most likely try to keep away from these ferocious predators.
Arapaima gigas (Osteoglossiformes: Arapaimatidae; commonly known as pirarucu) stands out among Neotropical fish.
Among the species most exploited and consumed by the regional population, the pirarucu Arapaima gigas (Schinz 1822), known as Amazon cod, is highly valued in the market, especially when its meat is marketed dried and preserved with salt.