Jenynsia multidentata is a species of killifish from the family Anablepidae.

With onset of maturity, the anal fin of male fish develops into a gonopodium which can be brought forward on one side only.

[2] Based on the bending to the left or to the right of the tip of the gonopodium, two morphs of male fish can be distinguished.

Accepted synonyms are Fitzroyia multidentata also described by Jenyns in 1842 and Poecilia punctata which was suggested by Valenciennes in 1846.

[3] Jenynsia multidentata is an omnivorous-planktivorous fish which often occurs in high densities in (hyper)eutrophic shallow lakes and can feed on zooplankton, phytoplankton, periphyton, invertebrates as well as detritus.