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Arapaima
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=== Breeding === The arapaima male is a [[mouthbrooder]], like the related ''[[Osteoglossum]]'' genus, meaning the young are protected in his mouth until they are older. The female arapaima helps to protect the male and the young by circling them and fending off potential predators. In his book, ''Three Singles to Adventure'', naturalist [[Gerald Durrell]] reported that in British [[Guyana]], female arapaima had been seen secreting a white substance from a gland in the head, and that their young were seemingly feeding on the substance.
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