Arapaima and Similar Species
Arapaima gigas
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Open the appSeveral fish can be confused with Arapaima. Here are the key differences.
Species often confused with {name}
Arapaima agassizii
Arapaima agassizii
Key differences: Historically considered a synonym of A. gigas, recent taxonomic revisions suggest it may be a distinct species. Differentiation is primarily based on subtle morphological differences in scale counts, head shape, and fin placement, often requiring expert analysis.
Arapaima mapae
Arapaima mapae
Key differences: Another recently recognized species, distinguished by specific meristic and morphometric characteristics, such as the number of lateral line scales and the shape of the head. Generally smaller than A. gigas.
Arapaima leptosoma
Arapaima leptosoma
Key differences: Described in 2013, this species is characterized by a more slender body (leptosoma means 'slender body') and a unique sensory canal system on the head. It also has a distinct color pattern.
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