Gambusia holbrooki

Gambusia holbrooki
Gambusia holbrooki – Eastern Mosquitofish – Melanistic

FamilyScientific NameAuthorYearCommon Name
PoeciliidaeGambusia holbrookiGirard1859Eastern Mosquitofish

Gambusia holbrooki

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.

Gambusia gonopodium
Gambusia gonopodium

Gonopodiums: Gambusia affinis on the left; G. holbrooki on the right. From Rohde et al. (2009), modified from Etnier and Starnes (1993).

Similar Species:

Western Mosquitofish Gambusia affinis. Dorsal rays usually 6; anal rays usually. Third ray of the anal fin of the male without teeth, smooth.

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