• Webster's Revised Unabridged Dictionary
    • n Arapaima (Zoöl) A large fresh-water food fish of South America.
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Century Dictionary and Cyclopedia
    • n arapaima The 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.
    • n arapaima [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.
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Webster's Revised Unabridged Dictionary
Prob. native name


In news:

During Brazil's wet season, rivers flood, forming lakes where piranhas and arapaimas comfortably coexist.
So piranhas leave arapaimas alone.
Yet they still don't attack arapaimas.