|Family||Scientific Name||Author||Year||Common Name|
|Poeciliidae||Gambusia holbrooki||Girard||1859||Eastern Mosquitofish|
Unique Characters: Large dusky, black teardrop (often reduced) below eye. One to three rows of spots on dorsal and caudal fins. Dorsal rays usually 7; anal rays 10. Third ray of the anal fin in the male with series of prominent teeth. Often melanistic males present.
Gonopodiums: Gambusia affinis on the left; G. holbrooki on the right. From Rohde et al. (2009), modified from Etnier and Starnes (1993).
Western Mosquitofish Gambusia affinis. Dorsal rays usually 6; anal rays usually. Third ray of the anal fin of the male without teeth, smooth.