| Family | Scientific Name | Author | Year | Common Name |
| Poeciliidae | Poecilia latipinna | (Lesueur) | 1812 | Sailfin Molly |
Poecilia latipinna
Unique Characters: Body with about 5-7 rows of dark spots. Male has high and long, sail-like dorsal fin. Deep caudal peduncle
Similar Species:
Eastern Mosquitofish Gambusia holbrooki
Western Mosquitofish Gambusia affinis
Rainwater Killifish
Lucania parva
Gambusia holbrooki
Gambusia affinis
Eastern Mosquitofish Gambusia holbrooki. Dorsal rays usually 7; anal rays usually 10. Third ray of the anal fin of the male with series of prominent teeth. Lateral rows of spots absent.
Western Mosquitofish Gambusia affinis. Dorsal rays usually 6; anal rays usually. Third ray of the anal fin of the male without teeth, smooth. Lateral rows of spots absent.
Rainwater Killifish Lucania parva. 3rd anal ray branched in both sexes. Lateral rows of spots absent.
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