nArapaima(Zoöl) A large fresh-water food fish of South America.
Century Dictionary and Cyclopedia
narapaimaThe name of the largest known fresh-water fish, Arapaima gigas, an inhabitant of Brazil and Guiana, said to attain a length of 15 feet and a weight of 400 pounds. It is of economical importance as a food-fish.
narapaima[capitalized] [NL.] A genus of malacopterygian abdominal fishes, of the family Osteoglossidœ, remarkable for their size and the mosaic work of their hard bony compound scales. A. gigas is an example.
Webster's Revised Unabridged Dictionary
Prob. native name
During Brazil's wet season, rivers flood, forming lakes where piranhas and arapaimas comfortably coexist.