Mexican tetras? The only way you can get those is if you catch them your self in TX. I have been looking to buy those for years, and no luck.
i got them from an lfs so i guess i got lucky, the catfish were the tough ones to get, they're rarely found and when they are found big study places either pay a lot for them or they are released. They live deep in caves and are usually found when well drillers cut into one of them, but shipping them across the border wouldd have been expensive if not illegal.