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| Anablepidae | ||||||||||
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 Four-eyed fish, Anableps sp.
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Anablepinae Oxyzygonectinae |
Anablepidae is a family of freshwater and brackish water fishes living on river estuaries from southern Mexico to southern South America.[1] 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.
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One-Sided Reproduction
Fish in the subfamily Anablepinae are ovoviviparous. Curiously, they only mate on one side, right-"handed" males with left-"handed" females and vice versa.[2] The male of most species in the family has specialized anal rays which are greatly elongated and fused into a tube called a gonopodium associated with the sperm duct which he uses as an intromittent organ to deliver sperm to the female.
References
- ^ Nelson, Joseph, S. (2006). Fishes of the World. John Wiley & Sons, Inc.. ISBN 0471250317.
- ^ Four Eyes and More, the Family Anablepidae. WetWebMedia.com. Retrieved on 2007-03-30.
Other References
- Berra, Tim M. (2001). Freshwater Fish Distribution. San Diego: Academic Press. ISBN 0-12-093156-7
External links
- "Anablepidae". FishBase. Ed. Rainer Froese and Daniel Pauly. May 2006 version. N.p.: FishBase, 2006.
- Anableps anableps
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