Sentences with phrase «of swordtail»
In the Calnali River in Mexico, two pure species of swordtail fish live side by side with a third population that's a mix of the original two.
http://www.sciencemag.org/ Not exact matches
To see if the presence of UV signals mattered to female swordtails or Mexican tetras, the investigators put the fish in aquariums with illumination that mimicked natural underwater light conditions and filters that either blocked or permitted UV light.
When the researchers took UV photographs of five swordtail species, they found that UV ornamentation is most prominent in males of species that inhabit regions with lots of Mexican tetras.
Unlike the majority of fish in which females lay eggs that are later fertilized by males, live - bearers — which include species such as mollies, platies, guppies, swordtails and mosquitofish — have internal fertilization.
Striped swordtails and monarchs, grass yellows and redtops — all the butterflies — flitted leisurely from one flower to the next... As for us, we moved about in that unhurried way of the butterflies, as if the breeze was sweet, as if the sun on our skin was a caress.
If you browse around online, especially on Facebook, you will see a great many photos of exotic varieties of bettas, swordtails, guppies, glowfish, flowerhorns (cichlid hybrids), etc..