Neofundulus acutirostratus

<em>Neofundulus acutirostratus</em> is a freshwater killifish belonging to the family Rivulidae, a New World family of small, often annual or semi-annual fishes adapted to seasonal environments in South America. This species reaches a maximum recorded length of approximately 7.5 cm. Rivulids of the genus <em>Neofundulus</em> typically inhabit shallow seasonal pools, floodplain pools, and slow-moving streams subject to periodic desiccation. Many species in this family produce drought-resistant eggs capable of surviving dry seasons buried in substrate, with embryos entering diapause until flooding resumes. <em>Neofundulus acutirostratus</em> generally feeds on small invertebrates and zooplankton. The specific epithet "acutirostratus" refers to a sharply pointed snout. Details of specific habitat associations and the precise geographic distribution of this species remain limited in the ichthyological literature.