Astyanax mexicanus

Astyanax mexicanus is best known for its two distinct forms - the fully sighted surface-dwelling forms and the blind cave-dwelling variants. The cave form lacks pigment and develops heightened non-visual senses. These fish are noted for their adaptability, making them fascinating subjects for evolutionary biology and genetics studies. In home aquariums, the surface-dwelling fish display vibrant silver coloration and active, schooling behavior. Due to their adaptability, they can be a suitable choice for hobbyists at various skill levels.