Abstract
The introduction of exotic species, although harmful to the natural environment, still occurs accidentally, intentionally or as a strategy of biological control. In this work, a specimen of Betta splendens was collected and recorded for Northeastern Brazil, a fish of the family Osphronemidae, originally from Asia. This species has the potential to compete with the native species, causing alterations in the natural community. The record of this species in Brazilian environments and the lack of diagnostic works on this region makes this work of special importance and as an incentive for future investigations.
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