Blind Mexican Cave Fish
Blind cave tetra water conditions.
Blind mexican cave fish. The heater should be set to a minimum of 68 degrees fahrenheit and it can go all the way up to 77 degrees. The male is smaller and slimmer than the female. There is no need for eye sight in the pitch black caves so they have evolved to adapt to these conditions.
9 cm 3 5 to 12 cm 4 7. It is amazing to see how they change direction to avoid plants rocks other fish and the sides of the tank. Mexico guatemala usa biotope.
20 to 25 c or 68 to 77 f ph. One such process in mexican blind cavefish is a phenomenon called pleiotropy in which genes usually involved in eye development are reassigned to features more useful to life in caves such as. Even in thickly planted aquariums and rarely bumps into the foliage.
When it comes to water acidity it should be held between 6 5 and 8 0 ph. 100 l 22 imp gal 26 us gal. Meet astyanax mexicanus also known as the mexican blind cavefish or blind cave tetra.
A larger tetra blind cave tetras need a minimum of 20 gallons for a school of 5. The fish are equipped with extremely sensitive organs that warn them of obstacles in their path. 3 4 the type species of its genus it is native to the nearctic realm originating in the lower rio grande and the neueces and pecos rivers in texas as well as the central and eastern parts of mexico.
One with eyes and one without any eyes. 6 5 to 8 hardness. The body of the blind cavefish is typical of the tetra one of several species of small freshwater fish in the family characidae elongated and compressed laterally overall the color is a silvery white to a pale brassy silvery except for a black lateral stripe that extends from the caudal base to the center of the caudal fin.
Mexican tetra blind cave fish. But what about a species of fish that has evolved and adapted to having no eyes at all. The blind cave tetra lives in deep caves in the wild.
They can reach up to. The water shouldn t be soft at all as blind cave tetras prefer it to be hard or moderately hard. Because mexican cavefish are a variant of the mexican tetra the fish can interbreed with some of the surface dwelling fish migrating and joining the cave populations the study showed.
Anoptichthys jordani or the blind cave fish swim at all depths. It is a natural occurrence of genetic chance.
