Common Name(s)
Mexican tetra, blind cave tetra
Scientific Name
Astyanax mexicanus
Family
Characidae
Origin
Mexico, Guatemala, Southern United States
Temperament
Peaceful
Maximum Size
3.3 inches
Minimum Tank Size
20 gallon long , 30 gallon long for a group (36 x 12)
Tank Setup
Nothing in particular
Tank Region
Middle-top
Diet
Dried foods, with live foods as a supplement.
Breeding
Egg-scatterer. Doesn't take care of its young.
Compatibility
Peaceful, just keep with temp-compatible fish.
Ease of Keeping
Easy
Care
pH: Doesn't matter; Temperature: 68-77 Fahrenheit
Astyanax_mexicanus.jpg

By User:Haplochromis - Self-photographed, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3037258

Above is the blind, cave form, the lower one is the normal surface dwelling form.

This fish, as you can see, has two forms in the wild, which are the same species. One is eyeless and pink, the other a normal fish.

This species, although a tetra, is not particularly gregarious, so does not require a group. But they will be fine in groups.

Females are larger and fuller bodied than males.