Anableps


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Anableps

 

(four-eyed fishes), a genus of viviparous fishes of the family Anablepidae of the order Cyprinodontiformes. The body length is 15–20 cm (rarely to 30 cm). The cornea and retina of the eyes are divided by an epithelial septum into upper and lower divisions. The upper part is adapted for vision above the water. Hence, the fishes, which usually swim near the surface, are able to see over and under the water simultaneously. There are two known species of four-eyed fishes, inhabiting lagoons in Central America and northern South America. The fishes feed on small invertebrates, mainly flying insects, found in the water or above the water’s surface. Fertilization is internal; one to five fry, measuring 4–6 cm long, are born.

REFERENCES

Zhizn’ zhivotnykh, vol. 4, part 1. Moscow, 1971.
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Que yo sepa ninguno de los que han descrito este maravilloso aparato ha observado nunca un Anableps vivo.
El Anableps de Dowe se da solo en las tierras bajas, por toda America Central, desde Panama al istmo de Tehuantepec, tanto en el lado del Atlantico como en el del Pacifico.
This is the case of Poptella compressa, Pygocentrus nattereri, Serrasalmus rhombeus, Cynodon gibbus, Hemiodus argenteus, Aspredo aspredo, Ageneiosus ucayalensis, Hemiodontichthys acipenserinus, Loricariichthys acutus, Pterygoplichthys punctatus, Pseudoplatystoma punctifer, Strongylura marina, Anchovia surinamensis, Pterengraulis atherinoides, Anableps anableps, and Pachypops fourcroi.
Several species (Apionichthys dumerili, Anableps anableps, Centropomus parallelus, Strongyrula marina, Anchovia surinamensis, Pterengraulis atherinoides, and Pseudauchenipterus nodosus) were only collected on the lower Itapecuru, indicating a preference for estuarine environments.