Pachypanchax sparksorum

Pachypanchax sparksorum is a small freshwater killifish of the family Aplocheilidae that is endemic to Madagascar. Its natural habitat is rivers, and the published range is the Anjingo River and the streams that feed the Ankofia River, with the Anjingo being the principal tributary of the Ankofia. The species was named by Paul V. Loiselle in 2006, in a review of the Malagasy Pachypanchax that described four new species in the journal Zootaxa. The specific name honours the American ichthyologist John Stephen Sparks and his wife Karen Riseng Sparks, who were among the first to document a distinctive Pachypanchax in the Ankofia drainage and who collected many of the specimens in the type series. FishBase gives a maximum length of 5.5 cm standard length and lists the fish as an inhabitant of shallow river areas, where it shelters along the banks or among rocks and feeds on small shrimps and on terrestrial and aquatic insects.