Species profiles

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Anablepidae is a family of fishes which live in brackish and freshwater habitats from southern Mexico to southern South America. There are three genera with sixteen species: the four-eyed fishes (genus Anableps), the onesided livebearers (genus Jenynsia) and the white-eye, Oxyzygonectes dovii. Fish of this family eat mostly insects and other invertebrates.


Goodeids are fish endemic to Mexico and some areas of the United States. This family contains about 50 species within 18 genera. The family is named after ichthyologist George Brown Goode.


Poeciliinae is a subfamily of the family Poeciliidae

All of the members of the subfamily Poeciliinae are livebearers with the exception Tomereus. Tomereus gracilis the only species within the genus are unique amongst the Poeciliinae subfamily being an egg layer.

Zenarchopteridae, viviparous halfbeaks

The family Zenarchopteridae consists of five Genus all known as the ‘viviparous’ halfbeaks. The most common ones within the aquatic trade are the fresh and brackish water halfbeaks of the genera Dermogenys, Hemirhamphodon, and Nomorhamphus. These for the most part are livebearers, the notable exception being H. tengah which is an egg laying species.

Halfbeaks are slender, streamlined fish with specially adapted lower jaws which gives the halfbeaks their common name. Halfbeaks are predatory and are predominantly surface feeders.